CINXE.COM
NIST Museum and Archives | NIST
<!DOCTYPE html> <html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# "> <head><script type="text/javascript" src="/_static/js/bundle-playback.js?v=HxkREWBo" charset="utf-8"></script> <script type="text/javascript" src="/_static/js/wombat.js?v=txqj7nKC" charset="utf-8"></script> <script>window.RufflePlayer=window.RufflePlayer||{};window.RufflePlayer.config={"autoplay":"on","unmuteOverlay":"hidden"};</script> <script type="text/javascript" src="/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("https://www.nist.gov/nist-museum","20230928042151","https://web.archive.org/","web","/_static/", "1695874911"); </script> <link rel="stylesheet" type="text/css" href="/_static/css/banner-styles.css?v=S1zqJCYt" /> <link rel="stylesheet" type="text/css" href="/_static/css/iconochive.css?v=3PDvdIFv" /> <!-- End Wayback Rewrite JS Include --> <meta charset="utf-8"/><script type="text/javascript">(window.NREUM||(NREUM={})).init={ajax:{deny_list:["gov-bam.nr-data.net"]}};(window.NREUM||(NREUM={})).loader_config={licenseKey:"37b7ccb661",applicationID:"1089704227"};;/*! For license information please see nr-loader-rum-1.242.0.min.js.LICENSE.txt */ (()=>{"use strict";var e,t,n={234:(e,t,n)=>{n.d(t,{P_:()=>h,Mt:()=>m,C5:()=>s,DL:()=>w,OP:()=>j,lF:()=>N,Yu:()=>_,Dg:()=>v,CX:()=>c,GE:()=>A,sU:()=>T});var r=n(8632),i=n(9567);const a={beacon:r.ce.beacon,errorBeacon:r.ce.errorBeacon,licenseKey:void 0,applicationID:void 0,sa:void 0,queueTime:void 0,applicationTime:void 0,ttGuid:void 0,user:void 0,account:void 0,product:void 0,extra:void 0,jsAttributes:{},userAttributes:void 0,atts:void 0,transactionName:void 0,tNamePlain:void 0},o={};function s(e){if(!e)throw new Error("All info objects require an agent identifier!");if(!o[e])throw new Error("Info for ".concat(e," was never set"));return o[e]}function c(e,t){if(!e)throw new Error("All info objects require an agent identifier!");o[e]=(0,i.D)(t,a),(0,r.Qy)(e,o[e],"info")}const d=e=>{if(!e||"string"!=typeof e)return!1;try{document.createDocumentFragment().querySelector(e)}catch{return!1}return!0};var u=n(7056),l=n(50);const f=()=>{const e={mask_selector:"*",block_selector:"[data-nr-block]",mask_input_options:{color:!1,date:!1,"datetime-local":!1,email:!1,month:!1,number:!1,range:!1,search:!1,tel:!1,text:!1,time:!1,url:!1,week:!1,textarea:!1,select:!1,password:!0}};return{proxy:{assets:void 0,beacon:void 0},privacy:{cookies_enabled:!0},ajax:{deny_list:void 0,block_internal:!0,enabled:!0,harvestTimeSeconds:10,autoStart:!0},distributed_tracing:{enabled:void 0,exclude_newrelic_header:void 0,cors_use_newrelic_header:void 0,cors_use_tracecontext_headers:void 0,allowed_origins:void 0},session:{domain:void 0,expiresMs:u.oD,inactiveMs:u.Hb},ssl:void 0,obfuscate:void 0,jserrors:{enabled:!0,harvestTimeSeconds:10,autoStart:!0},metrics:{enabled:!0,autoStart:!0},page_action:{enabled:!0,harvestTimeSeconds:30,autoStart:!0},page_view_event:{enabled:!0,autoStart:!0},page_view_timing:{enabled:!0,harvestTimeSeconds:30,long_task:!1,autoStart:!0},session_trace:{enabled:!0,harvestTimeSeconds:10,autoStart:!0},harvest:{tooManyRequestsDelay:60},session_replay:{autoStart:!0,enabled:!1,harvestTimeSeconds:60,sampling_rate:50,error_sampling_rate:50,mask_all_inputs:!0,get mask_text_selector(){return e.mask_selector},set mask_text_selector(t){d(t)?e.mask_selector=t+",[data-nr-mask]":null===t?e.mask_selector=t:(0,l.Z)("An invalid session_replay.mask_selector was provided and will not be used",t)},get block_class(){return"nr-block"},get ignore_class(){return"nr-ignore"},get mask_text_class(){return"nr-mask"},get block_selector(){return e.block_selector},set block_selector(t){d(t)?e.block_selector+=",".concat(t):""!==t&&(0,l.Z)("An invalid session_replay.block_selector was provided and will not be used",t)},get mask_input_options(){return e.mask_input_options},set mask_input_options(t){t&&"object"==typeof t?e.mask_input_options={...t,password:!0}:(0,l.Z)("An invalid session_replay.mask_input_option was provided and will not be used",t)}},spa:{enabled:!0,harvestTimeSeconds:10,autoStart:!0}}},g={},p="All configuration objects require an agent identifier!";function h(e){if(!e)throw new Error(p);if(!g[e])throw new Error("Configuration for ".concat(e," was never set"));return g[e]}function v(e,t){if(!e)throw new Error(p);g[e]=(0,i.D)(t,f()),(0,r.Qy)(e,g[e],"config")}function m(e,t){if(!e)throw new Error(p);var n=h(e);if(n){for(var r=t.split("."),i=0;i<r.length-1;i++)if("object"!=typeof(n=n[r[i]]))return;n=n[r[r.length-1]]}return n}const b={accountID:void 0,trustKey:void 0,agentID:void 0,licenseKey:void 0,applicationID:void 0,xpid:void 0},y={};function w(e){if(!e)throw new Error("All loader-config objects require an agent identifier!");if(!y[e])throw new Error("LoaderConfig for ".concat(e," was never set"));return y[e]}function A(e,t){if(!e)throw new Error("All loader-config objects require an agent identifier!");y[e]=(0,i.D)(t,b),(0,r.Qy)(e,y[e],"loader_config")}const _=(0,r.mF)().o;var x=n(385),D=n(6818);const k={buildEnv:D.Re,customTransaction:void 0,disabled:!1,distMethod:D.gF,isolatedBacklog:!1,loaderType:void 0,maxBytes:3e4,offset:Math.floor(x._A?.performance?.timeOrigin||x._A?.performance?.timing?.navigationStart||Date.now()),onerror:void 0,origin:""+x._A.location,ptid:void 0,releaseIds:{},session:void 0,xhrWrappable:"function"==typeof x._A.XMLHttpRequest?.prototype?.addEventListener,version:D.q4,denyList:void 0},E={};function j(e){if(!e)throw new Error("All runtime objects require an agent identifier!");if(!E[e])throw new Error("Runtime for ".concat(e," was never set"));return E[e]}function T(e,t){if(!e)throw new Error("All runtime objects require an agent identifier!");E[e]=(0,i.D)(t,k),(0,r.Qy)(e,E[e],"runtime")}function N(e){return function(e){try{const t=s(e);return!!t.licenseKey&&!!t.errorBeacon&&!!t.applicationID}catch(e){return!1}}(e)}},9567:(e,t,n)=>{n.d(t,{D:()=>i});var r=n(50);function i(e,t){try{if(!e||"object"!=typeof e)return(0,r.Z)("Setting a Configurable requires an object as input");if(!t||"object"!=typeof t)return(0,r.Z)("Setting a Configurable requires a model to set its initial properties");const n=Object.create(Object.getPrototypeOf(t),Object.getOwnPropertyDescriptors(t)),a=0===Object.keys(n).length?e:n;for(let o in a)if(void 0!==e[o])try{"object"==typeof e[o]&&"object"==typeof t[o]?n[o]=i(e[o],t[o]):n[o]=e[o]}catch(e){(0,r.Z)("An error occurred while setting a property of a Configurable",e)}return n}catch(e){(0,r.Z)("An error occured while setting a Configurable",e)}}},6818:(e,t,n)=>{n.d(t,{Re:()=>i,gF:()=>a,q4:()=>r});const r="1.242.0",i="PROD",a="CDN"},385:(e,t,n)=>{n.d(t,{Nk:()=>u,Tt:()=>s,_A:()=>a,cv:()=>l,iS:()=>o,il:()=>r,ux:()=>c,v6:()=>i,w1:()=>d});const r="undefined"!=typeof window&&!!window.document,i="undefined"!=typeof WorkerGlobalScope&&("undefined"!=typeof self&&self instanceof WorkerGlobalScope&&self.navigator instanceof WorkerNavigator||"undefined"!=typeof globalThis&&globalThis instanceof WorkerGlobalScope&&globalThis.navigator instanceof WorkerNavigator),a=r?window:"undefined"!=typeof WorkerGlobalScope&&("undefined"!=typeof self&&self instanceof WorkerGlobalScope&&self||"undefined"!=typeof globalThis&&globalThis instanceof WorkerGlobalScope&&globalThis),o=Boolean("hidden"===a?.document?.visibilityState),s=(a?.location,/iPad|iPhone|iPod/.test(a.navigator?.userAgent)),c=s&&"undefined"==typeof SharedWorker,d=((()=>{const e=a.navigator?.userAgent?.match(/Firefox[/\s](\d+\.\d+)/);Array.isArray(e)&&e.length>=2&&e[1]})(),Boolean(r&&window.document.documentMode)),u=!!a.navigator?.sendBeacon,l=Math.floor(a?.performance?.timeOrigin||a?.performance?.timing?.navigationStart||Date.now())},1117:(e,t,n)=>{n.d(t,{w:()=>a});var r=n(50);const i={agentIdentifier:"",ee:void 0};class a{constructor(e){try{if("object"!=typeof e)return(0,r.Z)("shared context requires an object as input");this.sharedContext={},Object.assign(this.sharedContext,i),Object.entries(e).forEach((e=>{let[t,n]=e;Object.keys(i).includes(t)&&(this.sharedContext[t]=n)}))}catch(e){(0,r.Z)("An error occured while setting SharedContext",e)}}}},8e3:(e,t,n)=>{n.d(t,{L:()=>u,R:()=>c});var r=n(8325),i=n(1284),a=n(4322),o=n(3325);const s={};function c(e,t){const n={staged:!1,priority:o.p[t]||0};d(e),s[e].get(t)||s[e].set(t,n)}function d(e){e&&(s[e]||(s[e]=new Map))}function u(){let e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"",t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"feature";if(d(e),!e||!s[e].get(t))return o(t);s[e].get(t).staged=!0;const n=[...s[e]];function o(t){const n=e?r.ee.get(e):r.ee,o=a.X.handlers;if(n.backlog&&o){var s=n.backlog[t],c=o[t];if(c){for(var d=0;s&&d<s.length;++d)l(s[d],c);(0,i.D)(c,(function(e,t){(0,i.D)(t,(function(t,n){n[0].on(e,n[1])}))}))}delete o[t],n.backlog[t]=null,n.emit("drain-"+t,[])}}n.every((e=>{let[t,n]=e;return n.staged}))&&(n.sort(((e,t)=>e[1].priority-t[1].priority)),n.forEach((t=>{let[n]=t;s[e].delete(n),o(n)})))}function l(e,t){var n=e[1];(0,i.D)(t[n],(function(t,n){var r=e[0];if(n[0]===r){var i=n[1],a=e[3],o=e[2];i.apply(a,o)}}))}},8325:(e,t,n)=>{n.d(t,{A:()=>c,ee:()=>d});var r=n(8632),i=n(2210),a=n(234);class o{constructor(e){this.contextId=e}}var s=n(3117);const c="nr@context:".concat(s.a),d=function e(t,n){var r={},s={},u={},f=!1;try{f=16===n.length&&(0,a.OP)(n).isolatedBacklog}catch(e){}var g={on:h,addEventListener:h,removeEventListener:function(e,t){var n=r[e];if(!n)return;for(var i=0;i<n.length;i++)n[i]===t&&n.splice(i,1)},emit:function(e,n,r,i,a){!1!==a&&(a=!0);if(d.aborted&&!i)return;t&&a&&t.emit(e,n,r);for(var o=p(r),c=v(e),u=c.length,l=0;l<u;l++)c[l].apply(o,n);var f=b()[s[e]];f&&f.push([g,e,n,o]);return o},get:m,listeners:v,context:p,buffer:function(e,t){const n=b();if(t=t||"feature",g.aborted)return;Object.entries(e||{}).forEach((e=>{let[r,i]=e;s[i]=t,t in n||(n[t]=[])}))},abort:l,aborted:!1,isBuffering:function(e){return!!b()[s[e]]},debugId:n,backlog:f?{}:t&&"object"==typeof t.backlog?t.backlog:{}};return g;function p(e){return e&&e instanceof o?e:e?(0,i.X)(e,c,(()=>new o(c))):new o(c)}function h(e,t){r[e]=v(e).concat(t)}function v(e){return r[e]||[]}function m(t){return u[t]=u[t]||e(g,t)}function b(){return g.backlog}}(void 0,"globalEE"),u=(0,r.fP)();function l(){d.aborted=!0,d.backlog={}}u.ee||(u.ee=d)},5546:(e,t,n)=>{n.d(t,{E:()=>r,p:()=>i});var r=n(8325).ee.get("handle");function i(e,t,n,i,a){a?(a.buffer([e],i),a.emit(e,t,n)):(r.buffer([e],i),r.emit(e,t,n))}},4322:(e,t,n)=>{n.d(t,{X:()=>a});var r=n(5546);a.on=o;var i=a.handlers={};function a(e,t,n,a){o(a||r.E,i,e,t,n)}function o(e,t,n,i,a){a||(a="feature"),e||(e=r.E);var o=t[a]=t[a]||{};(o[n]=o[n]||[]).push([e,i])}},3239:(e,t,n)=>{n.d(t,{bP:()=>s,iz:()=>c,m$:()=>o});var r=n(385);let i=!1,a=!1;try{const e={get passive(){return i=!0,!1},get signal(){return a=!0,!1}};r._A.addEventListener("test",null,e),r._A.removeEventListener("test",null,e)}catch(e){}function o(e,t){return i||a?{capture:!!e,passive:i,signal:t}:!!e}function s(e,t){let n=arguments.length>2&&void 0!==arguments[2]&&arguments[2],r=arguments.length>3?arguments[3]:void 0;window.addEventListener(e,t,o(n,r))}function c(e,t){let n=arguments.length>2&&void 0!==arguments[2]&&arguments[2],r=arguments.length>3?arguments[3]:void 0;document.addEventListener(e,t,o(n,r))}},3117:(e,t,n)=>{n.d(t,{a:()=>r});const r=(0,n(4402).Rl)()},4402:(e,t,n)=>{n.d(t,{Rl:()=>o,ky:()=>s});var r=n(385);const i="xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx";function a(e,t){return e?15&e[t]:16*Math.random()|0}function o(){const e=r._A?.crypto||r._A?.msCrypto;let t,n=0;return e&&e.getRandomValues&&(t=e.getRandomValues(new Uint8Array(31))),i.split("").map((e=>"x"===e?a(t,++n).toString(16):"y"===e?(3&a()|8).toString(16):e)).join("")}function s(e){const t=r._A?.crypto||r._A?.msCrypto;let n,i=0;t&&t.getRandomValues&&(n=t.getRandomValues(new Uint8Array(31)));const o=[];for(var s=0;s<e;s++)o.push(a(n,++i).toString(16));return o.join("")}},7056:(e,t,n)=>{n.d(t,{Bq:()=>r,Hb:()=>a,oD:()=>i});const r="NRBA",i=144e5,a=18e5},7894:(e,t,n)=>{function r(){return Math.round(performance.now())}n.d(t,{z:()=>r})},50:(e,t,n)=>{function r(e,t){"function"==typeof console.warn&&(console.warn("New Relic: ".concat(e)),t&&console.warn(t))}n.d(t,{Z:()=>r})},2587:(e,t,n)=>{n.d(t,{N:()=>c,T:()=>d});var r=n(8325),i=n(5546),a=n(3325);const o={stn:[a.D.sessionTrace],err:[a.D.jserrors,a.D.metrics],ins:[a.D.pageAction],spa:[a.D.spa],sr:[a.D.sessionReplay,a.D.sessionTrace]},s=new Set;function c(e,t){const n=r.ee.get(t);e&&"object"==typeof e&&(s.has(t)||Object.entries(e).forEach((e=>{let[t,r]=e;o[t]?o[t].forEach((e=>{r?(0,i.p)("feat-"+t,[],void 0,e,n):(0,i.p)("block-"+t,[],void 0,e,n),(0,i.p)("rumresp-"+t,[Boolean(r)],void 0,e,n)})):r&&(0,i.p)("feat-"+t,[],void 0,void 0,n),d[t]=Boolean(r)})),Object.keys(o).forEach((e=>{void 0===d[e]&&(o[e]?.forEach((t=>(0,i.p)("rumresp-"+e,[!1],void 0,t,n))),d[e]=!1)})),s.add(t))}const d={}},2210:(e,t,n)=>{n.d(t,{X:()=>i});var r=Object.prototype.hasOwnProperty;function i(e,t,n){if(r.call(e,t))return e[t];var i=n();if(Object.defineProperty&&Object.keys)try{return Object.defineProperty(e,t,{value:i,writable:!0,enumerable:!1}),i}catch(e){}return e[t]=i,i}},1284:(e,t,n)=>{n.d(t,{D:()=>r});const r=(e,t)=>Object.entries(e||{}).map((e=>{let[n,r]=e;return t(n,r)}))},4351:(e,t,n)=>{n.d(t,{P:()=>a});var r=n(8325);const i=()=>{const e=new WeakSet;return(t,n)=>{if("object"==typeof n&&null!==n){if(e.has(n))return;e.add(n)}return n}};function a(e){try{return JSON.stringify(e,i())}catch(e){try{r.ee.emit("internal-error",[e])}catch(e){}}}},3960:(e,t,n)=>{n.d(t,{K:()=>o,b:()=>a});var r=n(3239);function i(){return"undefined"==typeof document||"complete"===document.readyState}function a(e,t){if(i())return e();(0,r.bP)("load",e,t)}function o(e){if(i())return e();(0,r.iz)("DOMContentLoaded",e)}},8632:(e,t,n)=>{n.d(t,{EZ:()=>d,Qy:()=>c,ce:()=>a,fP:()=>o,gG:()=>u,mF:()=>s});var r=n(7894),i=n(385);const a={beacon:"bam.nr-data.net",errorBeacon:"bam.nr-data.net"};function o(){return i._A.NREUM||(i._A.NREUM={}),void 0===i._A.newrelic&&(i._A.newrelic=i._A.NREUM),i._A.NREUM}function s(){let e=o();return e.o||(e.o={ST:i._A.setTimeout,SI:i._A.setImmediate,CT:i._A.clearTimeout,XHR:i._A.XMLHttpRequest,REQ:i._A.Request,EV:i._A.Event,PR:i._A.Promise,MO:i._A.MutationObserver,FETCH:i._A.fetch}),e}function c(e,t,n){let i=o();const a=i.initializedAgents||{},s=a[e]||{};return Object.keys(s).length||(s.initializedAt={ms:(0,r.z)(),date:new Date}),i.initializedAgents={...a,[e]:{...s,[n]:t}},i}function d(e,t){o()[e]=t}function u(){return function(){let e=o();const t=e.info||{};e.info={beacon:a.beacon,errorBeacon:a.errorBeacon,...t}}(),function(){let e=o();const t=e.init||{};e.init={...t}}(),s(),function(){let e=o();const t=e.loader_config||{};e.loader_config={...t}}(),o()}},7956:(e,t,n)=>{n.d(t,{N:()=>i});var r=n(3239);function i(e){let t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=arguments.length>2?arguments[2]:void 0,i=arguments.length>3?arguments[3]:void 0;(0,r.iz)("visibilitychange",(function(){if(t)return void("hidden"===document.visibilityState&&e());e(document.visibilityState)}),n,i)}},3081:(e,t,n)=>{n.d(t,{gF:()=>a,mY:()=>i,t9:()=>r,vz:()=>s,xS:()=>o});const r=n(3325).D.metrics,i="sm",a="cm",o="storeSupportabilityMetrics",s="storeEventMetrics"},7633:(e,t,n)=>{n.d(t,{t:()=>r});const r=n(3325).D.pageViewEvent},9251:(e,t,n)=>{n.d(t,{t:()=>r});const r=n(3325).D.pageViewTiming},5938:(e,t,n)=>{n.d(t,{W:()=>a});var r=n(234),i=n(8325);class a{constructor(e,t,n){this.agentIdentifier=e,this.aggregator=t,this.ee=i.ee.get(e,(0,r.OP)(this.agentIdentifier).isolatedBacklog),this.featureName=n,this.blocked=!1}}},7530:(e,t,n)=>{n.d(t,{j:()=>b});var r=n(3325),i=n(234),a=n(5546),o=n(8325),s=n(7894),c=n(8e3),d=n(3960),u=n(385),l=n(50),f=n(3081),g=n(8632);function p(){const e=(0,g.gG)();["setErrorHandler","finished","addToTrace","inlineHit","addRelease","addPageAction","setCurrentRouteName","setPageViewName","setCustomAttribute","interaction","noticeError","setUserId","setApplicationVersion","start"].forEach((t=>{e[t]=function(){for(var n=arguments.length,r=new Array(n),i=0;i<n;i++)r[i]=arguments[i];return function(t){for(var n=arguments.length,r=new Array(n>1?n-1:0),i=1;i<n;i++)r[i-1]=arguments[i];let a=[];return Object.values(e.initializedAgents).forEach((e=>{e.exposed&&e.api[t]&&a.push(e.api[t](...r))})),a.length>1?a:a[0]}(t,...r)}}))}var h=n(2587);const v=e=>{n.p=e};let m=!1;function b(e){let t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},b=arguments.length>2?arguments[2]:void 0,y=arguments.length>3?arguments[3]:void 0,{init:w,info:A,loader_config:_,runtime:x={loaderType:b},exposed:D=!0}=t;const k=(0,g.gG)();A||(w=k.init,A=k.info,_=k.loader_config),(0,i.Dg)(e,w||{}),(0,i.GE)(e,_||{}),A.jsAttributes??={},u.v6&&(A.jsAttributes.isWorker=!0),(0,i.CX)(e,A);const E=(0,i.P_)(e),j=[A.beacon,A.errorBeacon];m||(m=!0,E.proxy.assets&&(v(E.proxy.assets+"/"),j.push(E.proxy.assets)),E.proxy.beacon&&j.push(E.proxy.beacon)),x.denyList=[...E.ajax.deny_list||[],...E.ajax.block_internal?j:[]],(0,i.sU)(e,x),p();const T=function(e,t){t||(0,c.R)(e,"api");const g={};var p=o.ee.get(e),h=p.get("tracer"),v="api-",m=v+"ixn-";function b(t,n,r,a){const o=(0,i.C5)(e);return null===n?delete o.jsAttributes[t]:(0,i.CX)(e,{...o,jsAttributes:{...o.jsAttributes,[t]:n}}),A(v,r,!0,a||null===n?"session":void 0)(t,n)}function y(){}["setErrorHandler","finished","addToTrace","inlineHit","addRelease"].forEach((e=>{g[e]=A(v,e,!0,"api")})),g.addPageAction=A(v,"addPageAction",!0,r.D.pageAction),g.setCurrentRouteName=A(v,"routeName",!0,r.D.spa),g.setPageViewName=function(t,n){if("string"==typeof t)return"/"!==t.charAt(0)&&(t="/"+t),(0,i.OP)(e).customTransaction=(n||"https://web.archive.org/web/20230928042151/http://custom.transaction")+t,A(v,"setPageViewName",!0)()},g.setCustomAttribute=function(e,t){let n=arguments.length>2&&void 0!==arguments[2]&&arguments[2];if("string"==typeof e){if(["string","number"].includes(typeof t)||null===t)return b(e,t,"setCustomAttribute",n);(0,l.Z)("Failed to execute setCustomAttribute.\nNon-null value must be a string or number type, but a type of <".concat(typeof t,"> was provided."))}else(0,l.Z)("Failed to execute setCustomAttribute.\nName must be a string type, but a type of <".concat(typeof e,"> was provided."))},g.setUserId=function(e){if("string"==typeof e||null===e)return b("enduser.id",e,"setUserId",!0);(0,l.Z)("Failed to execute setUserId.\nNon-null value must be a string type, but a type of <".concat(typeof e,"> was provided."))},g.setApplicationVersion=function(e){if("string"==typeof e||null===e)return b("application.version",e,"setApplicationVersion",!1);(0,l.Z)("Failed to execute setApplicationVersion. Expected <String | null>, but got <".concat(typeof e,">."))},g.start=e=>{try{const t=e?"defined":"undefined";(0,a.p)(f.xS,["API/start/".concat(t,"/called")],void 0,r.D.metrics,p);const n=Object.values(r.D);if(void 0===e)e=n;else{if((e=Array.isArray(e)&&e.length?e:[e]).some((e=>!n.includes(e))))return(0,l.Z)("Invalid feature name supplied. Acceptable feature names are: ".concat(n));e.includes(r.D.pageViewEvent)||e.push(r.D.pageViewEvent)}e.forEach((e=>{p.emit("".concat(e,"-opt-in"))}))}catch(e){(0,l.Z)("An unexpected issue occurred",e)}},g.interaction=function(){return(new y).get()};var w=y.prototype={createTracer:function(e,t){var n={},i=this,o="function"==typeof t;return(0,a.p)(m+"tracer",[(0,s.z)(),e,n],i,r.D.spa,p),function(){if(h.emit((o?"":"no-")+"fn-start",[(0,s.z)(),i,o],n),o)try{return t.apply(this,arguments)}catch(e){throw h.emit("fn-err",[arguments,this,e],n),e}finally{h.emit("fn-end",[(0,s.z)()],n)}}}};function A(e,t,n,i){return function(){return(0,a.p)(f.xS,["API/"+t+"/called"],void 0,r.D.metrics,p),i&&(0,a.p)(e+t,[(0,s.z)(),...arguments],n?null:this,i,p),n?void 0:this}}function _(){n.e(75).then(n.bind(n,7438)).then((t=>{let{setAPI:n}=t;n(e),(0,c.L)(e,"api")})).catch((()=>(0,l.Z)("Downloading runtime APIs failed...")))}return["actionText","setName","setAttribute","save","ignore","onEnd","getContext","end","get"].forEach((e=>{w[e]=A(m,e,void 0,r.D.spa)})),g.noticeError=function(e,t){"string"==typeof e&&(e=new Error(e)),(0,a.p)(f.xS,["API/noticeError/called"],void 0,r.D.metrics,p),(0,a.p)("err",[e,(0,s.z)(),!1,t],void 0,r.D.jserrors,p)},u.il?(0,d.b)((()=>_()),!0):_(),g}(e,y);return(0,g.Qy)(e,T,"api"),(0,g.Qy)(e,D,"exposed"),(0,g.EZ)("activatedFeatures",h.T),T}},3325:(e,t,n)=>{n.d(t,{D:()=>r,p:()=>i});const r={ajax:"ajax",jserrors:"jserrors",metrics:"metrics",pageAction:"page_action",pageViewEvent:"page_view_event",pageViewTiming:"page_view_timing",sessionReplay:"session_replay",sessionTrace:"session_trace",spa:"spa"},i={[r.pageViewEvent]:1,[r.pageViewTiming]:2,[r.metrics]:3,[r.jserrors]:4,[r.ajax]:5,[r.sessionTrace]:6,[r.pageAction]:7,[r.spa]:8,[r.sessionReplay]:9}}},r={};function i(e){var t=r[e];if(void 0!==t)return t.exports;var a=r[e]={exports:{}};return n[e](a,a.exports,i),a.exports}i.m=n,i.d=(e,t)=>{for(var n in t)i.o(t,n)&&!i.o(e,n)&&Object.defineProperty(e,n,{enumerable:!0,get:t[n]})},i.f={},i.e=e=>Promise.all(Object.keys(i.f).reduce(((t,n)=>(i.f[n](e,t),t)),[])),i.u=e=>"nr-rum-1.242.0.min.js",i.o=(e,t)=>Object.prototype.hasOwnProperty.call(e,t),e={},t="NRBA-1.242.0.PROD:",i.l=(n,r,a,o)=>{if(e[n])e[n].push(r);else{var s,c;if(void 0!==a)for(var d=document.getElementsByTagName("script"),u=0;u<d.length;u++){var l=d[u];if(l.getAttribute("src")==n||l.getAttribute("data-webpack")==t+a){s=l;break}}s||(c=!0,(s=document.createElement("script")).charset="utf-8",s.timeout=120,i.nc&&s.setAttribute("nonce",i.nc),s.setAttribute("data-webpack",t+a),s.src=n),e[n]=[r];var f=(t,r)=>{s.onerror=s.onload=null,clearTimeout(g);var i=e[n];if(delete e[n],s.parentNode&&s.parentNode.removeChild(s),i&&i.forEach((e=>e(r))),t)return t(r)},g=setTimeout(f.bind(null,void 0,{type:"timeout",target:s}),12e4);s.onerror=f.bind(null,s.onerror),s.onload=f.bind(null,s.onload),c&&document.head.appendChild(s)}},i.r=e=>{"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},i.p="https://web.archive.org/web/20230928042151/https://js-agent.newrelic.com/",(()=>{var e={50:0,832:0};i.f.j=(t,n)=>{var r=i.o(e,t)?e[t]:void 0;if(0!==r)if(r)n.push(r[2]);else{var a=new Promise(((n,i)=>r=e[t]=[n,i]));n.push(r[2]=a);var o=i.p+i.u(t),s=new Error;i.l(o,(n=>{if(i.o(e,t)&&(0!==(r=e[t])&&(e[t]=void 0),r)){var a=n&&("load"===n.type?"missing":n.type),o=n&&n.target&&n.target.src;s.message="Loading chunk "+t+" failed.\n("+a+": "+o+")",s.name="ChunkLoadError",s.type=a,s.request=o,r[1](s)}}),"chunk-"+t,t)}};var t=(t,n)=>{var r,a,[o,s,c]=n,d=0;if(o.some((t=>0!==e[t]))){for(r in s)i.o(s,r)&&(i.m[r]=s[r]);if(c)c(i)}for(t&&t(n);d<o.length;d++)a=o[d],i.o(e,a)&&e[a]&&e[a][0](),e[a]=0},n=self["webpackChunk:NRBA-1.242.0.PROD"]=self["webpackChunk:NRBA-1.242.0.PROD"]||[];n.forEach(t.bind(null,0)),n.push=t.bind(null,n.push.bind(n))})(),(()=>{var e=i(50);class t{addPageAction(t,n){(0,e.Z)("Call to agent api addPageAction failed. The session trace feature is not currently initialized.")}setPageViewName(t,n){(0,e.Z)("Call to agent api setPageViewName failed. The page view feature is not currently initialized.")}setCustomAttribute(t,n,r){(0,e.Z)("Call to agent api setCustomAttribute failed. The js errors feature is not currently initialized.")}noticeError(t,n){(0,e.Z)("Call to agent api noticeError failed. The js errors feature is not currently initialized.")}setUserId(t){(0,e.Z)("Call to agent api setUserId failed. The js errors feature is not currently initialized.")}setApplicationVersion(t){(0,e.Z)("Call to agent api setApplicationVersion failed. The agent is not currently initialized.")}setErrorHandler(t){(0,e.Z)("Call to agent api setErrorHandler failed. The js errors feature is not currently initialized.")}finished(t){(0,e.Z)("Call to agent api finished failed. The page action feature is not currently initialized.")}addRelease(t,n){(0,e.Z)("Call to agent api addRelease failed. The agent is not currently initialized.")}start(t){(0,e.Z)("Call to agent api addRelease failed. The agent is not currently initialized.")}}var n=i(3325),r=i(234);const a=Object.values(n.D);function o(e){const t={};return a.forEach((n=>{t[n]=function(e,t){return!1!==(0,r.Mt)(t,"".concat(e,".enabled"))}(n,e)})),t}var s=i(7530);var c=i(8e3),d=i(5938),u=i(3960),l=i(385);class f extends d.W{constructor(e,t,n){let i=!(arguments.length>3&&void 0!==arguments[3])||arguments[3];super(e,t,n),this.auto=i,this.abortHandler=void 0,this.featAggregate=void 0,this.onAggregateImported=void 0,!1===(0,r.Mt)(this.agentIdentifier,"".concat(this.featureName,".autoStart"))&&(this.auto=!1),this.auto&&(0,c.R)(e,n)}importAggregator(){let t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(this.featAggregate)return;if(!this.auto)return void this.ee.on("".concat(this.featureName,"-opt-in"),(()=>{(0,c.R)(this.agentIdentifier,this.featureName),this.auto=!0,this.importAggregator()}));const n=l.il&&!0===(0,r.Mt)(this.agentIdentifier,"privacy.cookies_enabled");let a;this.onAggregateImported=new Promise((e=>{a=e}));const o=async()=>{let r;try{if(n){const{setupAgentSession:e}=await i.e(75).then(i.bind(i,3228));r=e(this.agentIdentifier)}}catch(t){(0,e.Z)("A problem occurred when starting up session manager. This page will not start or extend any session.",t)}try{if(!this.shouldImportAgg(this.featureName,r))return(0,c.L)(this.agentIdentifier,this.featureName),void a(!1);const{lazyFeatureLoader:e}=await i.e(75).then(i.bind(i,8582)),{Aggregate:n}=await e(this.featureName,"aggregate");this.featAggregate=new n(this.agentIdentifier,this.aggregator,t),a(!0)}catch(t){(0,e.Z)("Downloading and initializing ".concat(this.featureName," failed..."),t),this.abortHandler?.(),(0,c.L)(this.agentIdentifier,this.featureName),a(!1)}};l.il?(0,u.b)((()=>o()),!0):o()}shouldImportAgg(e,t){return e!==n.D.sessionReplay||!!r.Yu.MO&&(!1!==(0,r.Mt)(this.agentIdentifier,"session_trace.enabled")&&(!!t?.isNew||!!t?.state.sessionReplay))}}var g=i(7633);class p extends f{static featureName=g.t;constructor(e,t){let n=!(arguments.length>2&&void 0!==arguments[2])||arguments[2];super(e,t,g.t,n),this.importAggregator()}}var h=i(1117),v=i(1284);class m extends h.w{constructor(e){super(e),this.aggregatedData={}}store(e,t,n,r,i){var a=this.getBucket(e,t,n,i);return a.metrics=function(e,t){t||(t={count:0});return t.count+=1,(0,v.D)(e,(function(e,n){t[e]=b(n,t[e])})),t}(r,a.metrics),a}merge(e,t,n,r,i){var a=this.getBucket(e,t,r,i);if(a.metrics){var o=a.metrics;o.count+=n.count,(0,v.D)(n,(function(e,t){if("count"!==e){var r=o[e],i=n[e];i&&!i.c?o[e]=b(i.t,r):o[e]=function(e,t){if(!t)return e;t.c||(t=y(t.t));return t.min=Math.min(e.min,t.min),t.max=Math.max(e.max,t.max),t.t+=e.t,t.sos+=e.sos,t.c+=e.c,t}(i,o[e])}}))}else a.metrics=n}storeMetric(e,t,n,r){var i=this.getBucket(e,t,n);return i.stats=b(r,i.stats),i}getBucket(e,t,n,r){this.aggregatedData[e]||(this.aggregatedData[e]={});var i=this.aggregatedData[e][t];return i||(i=this.aggregatedData[e][t]={params:n||{}},r&&(i.custom=r)),i}get(e,t){return t?this.aggregatedData[e]&&this.aggregatedData[e][t]:this.aggregatedData[e]}take(e){for(var t={},n="",r=!1,i=0;i<e.length;i++)t[n=e[i]]=w(this.aggregatedData[n]),t[n].length&&(r=!0),delete this.aggregatedData[n];return r?t:null}}function b(e,t){return null==e?function(e){e?e.c++:e={c:1};return e}(t):t?(t.c||(t=y(t.t)),t.c+=1,t.t+=e,t.sos+=e*e,e>t.max&&(t.max=e),e<t.min&&(t.min=e),t):{t:e}}function y(e){return{t:e,min:e,max:e,sos:e*e,c:1}}function w(e){return"object"!=typeof e?[]:(0,v.D)(e,A)}function A(e,t){return t}var _=i(8632),x=i(4402),D=i(4351);var k=i(5546),E=i(7956),j=i(3239),T=i(7894),N=i(9251);class S extends f{static featureName=N.t;constructor(e,t){let n=!(arguments.length>2&&void 0!==arguments[2])||arguments[2];super(e,t,N.t,n),l.il&&((0,E.N)((()=>(0,k.p)("docHidden",[(0,T.z)()],void 0,N.t,this.ee)),!0),(0,j.bP)("pagehide",(()=>(0,k.p)("winPagehide",[(0,T.z)()],void 0,N.t,this.ee))),this.importAggregator())}}var P=i(3081);class C extends f{static featureName=P.t9;constructor(e,t){let n=!(arguments.length>2&&void 0!==arguments[2])||arguments[2];super(e,t,P.t9,n),this.importAggregator()}}new class extends t{constructor(t){let n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:(0,x.ky)(16);super(),l._A?(this.agentIdentifier=n,this.sharedAggregator=new m({agentIdentifier:this.agentIdentifier}),this.features={},this.desiredFeatures=new Set(t.features||[]),this.desiredFeatures.add(p),Object.assign(this,(0,s.j)(this.agentIdentifier,t,t.loaderType||"agent")),this.run()):(0,e.Z)("Failed to initial the agent. Could not determine the runtime environment.")}get config(){return{info:(0,r.C5)(this.agentIdentifier),init:(0,r.P_)(this.agentIdentifier),loader_config:(0,r.DL)(this.agentIdentifier),runtime:(0,r.OP)(this.agentIdentifier)}}run(){const t="features";try{const r=o(this.agentIdentifier),i=[...this.desiredFeatures];i.sort(((e,t)=>n.p[e.featureName]-n.p[t.featureName])),i.forEach((t=>{if(r[t.featureName]||t.featureName===n.D.pageViewEvent){const i=function(e){switch(e){case n.D.ajax:return[n.D.jserrors];case n.D.sessionTrace:return[n.D.ajax,n.D.pageViewEvent];case n.D.sessionReplay:return[n.D.sessionTrace];case n.D.pageViewTiming:return[n.D.pageViewEvent];default:return[]}}(t.featureName);i.every((e=>r[e]))||(0,e.Z)("".concat(t.featureName," is enabled but one or more dependent features has been disabled (").concat((0,D.P)(i),"). This may cause unintended consequences or missing data...")),this.features[t.featureName]=new t(this.agentIdentifier,this.sharedAggregator)}})),(0,_.Qy)(this.agentIdentifier,this.features,t)}catch(n){(0,e.Z)("Failed to initialize all enabled instrument classes (agent aborted) -",n);for(const e in this.features)this.features[e].abortHandler?.();const r=(0,_.fP)();return delete r.initializedAgents[this.agentIdentifier]?.api,delete r.initializedAgents[this.agentIdentifier]?.[t],delete this.sharedAggregator,r.ee?.abort(),delete r.ee?.get(this.agentIdentifier),!1}}addToTrace(t){(0,e.Z)("Call to agent api addToTrace failed. The page action feature is not currently initialized.")}setCurrentRouteName(t){(0,e.Z)("Call to agent api setCurrentRouteName failed. The spa feature is not currently initialized.")}interaction(){(0,e.Z)("Call to agent api interaction failed. The spa feature is not currently initialized.")}}({features:[p,S,C],loaderType:"lite"})})()})();</script> <noscript><style>form.antibot * :not(.antibot-message) { display: none !important; }</style> </noscript><script async src="https://web.archive.org/web/20230928042151js_/https://www.googletagmanager.com/gtag/js?id=G-HEQ0YF2VYL"></script> <script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments)};gtag("js", new Date());gtag("set", "developer_id.dMDhkMT", true);gtag('set', {'cookie_flags': 'SameSite=None;Secure', 'cookie_domain': 'www.nist.gov'});gtag("config", "G-HEQ0YF2VYL", {"groups":"default","page_placeholder":"PLACEHOLDER_page_location","link_attribution":true,"allow_ad_personalization_signals":false});gtag("event", "custom", {"node_title":"NIST Museum and Archives","node_id":"1084771","content_type":"Laboratory\/Organizational Unit"});</script> <meta name="description" content="The NIST Museum and Archives, as part of the NIST Research Library and Museum, aims to increase awareness of the achievements and history of NIST through research, collection, and exhibition of scientific instruments, archival materials, and other historical artifacts."/> <link rel="canonical" href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum"/> <link rel="shortlink" href="https://web.archive.org/web/20230928042151/https://www.nist.gov/node/1084771"/> <meta name="citation_title" content="NIST Museum and Archives | NIST"/> <meta property="og:site_name" content="NIST"/> <meta property="og:type" content="Article"/> <meta property="og:url" content="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum"/> <meta property="og:title" content="NIST Museum and Archives"/> <meta property="og:description" content="The NIST Museum and Archives, as part of the NIST Research Library and Museum, aims to increase awareness of the achievements and history of NIST through research, collection, and exhibition of scientific instruments, archival materials, and other historical artifacts."/> <meta property="article:published_time" content="2016-08-01T15:46-04:00"/> <meta property="article:modified_time" content="2023-06-22T14:29-04:00"/> <meta name="dcterms.title" content="NIST Museum and Archives"/> <meta name="dcterms.description" content="The NIST Museum and Archives, as part of the NIST Research Library and Museum, aims to increase awareness of the achievements and history of NIST through research, collection, and exhibition of scientific instruments, archival materials, and other historical artifacts."/> <meta name="dcterms.date" content="2016-08-01T15:46-04:00"/> <meta name="dcterms.type" content="text"/> <meta name="dcterms.format" content="text/html"/> <meta name="dcterms.identifier" content="https://www.nist.gov/nist-museum"/> <meta name="dcterms.source" content="NIST"/> <meta name="dcterms.created" content="2016-08-01T15:46-04:00"/> <meta name="dcterms.modified" content="2023-06-22T14:29-04:00"/> <meta name="twitter:card" content="summary_large_image"/> <meta name="twitter:description" content="The NIST Museum and Archives, as part of the NIST Research Library and Museum, aims to increase awareness of the achievements and history of NIST through research, collection, and exhibition of scientific instruments, archival materials, and other historical artifacts."/> <meta name="twitter:site" content="NIST"/> <meta name="twitter:title" content="NIST Museum and Archives"/> <meta name="twitter:url" content="https://web.archive.org/web/20230928042151im_/https://www.nist.gov/nist-museum"/> <meta name="google-site-verification" content="QMu0ODkER3rN5hLcMLqNVf7e3bkjYsNLTuhqfH48jCA"/> <meta name="Generator" content="Drupal 9 (https://www.drupal.org)"/> <meta name="MobileOptimized" content="width"/> <meta name="HandheldFriendly" content="true"/> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <meta name="nist_search_modified" class="elastic" content="2023-06-22T14:29:00-04:00"/> <script type="application/ld+json">{ "@context": "https://web.archive.org/web/20230928042151/https://schema.org", "@graph": [ { "@type": "Article", "headline": "NIST Museum and Archives | NIST", "description": "The NIST Museum and Archives, as part of the NIST Research Library and Museum, aims to increase awareness of the achievements and history of NIST through research, collection, and exhibition of scientific instruments, archival materials, and other historical artifacts.", "datePublished": "2016-08-01T15:46-04:00", "dateModified": "2023-06-22T14:29-04:00" } ] }</script> <meta name="nist_search_bundle" class="elastic" content="laboratory_organizational_unit"/> <link rel="icon" href="/web/20230928042151im_/https://www.nist.gov/themes/custom/nist_www/favicon.ico" type="image/vnd.microsoft.icon"/> <title>NIST Museum and Archives | NIST</title> <link rel="stylesheet" media="all" href="/web/20230928042151cs_/https://www.nist.gov/sites/default/files/css/css_1_Lj-v7ZkX0hvm3RGtV8oacN4mbwoPojGjPViv3OsnY.css"/> <link rel="stylesheet" media="screen" href="/web/20230928042151cs_/https://www.nist.gov/sites/default/files/css/css_J7RuJ-PwWY36lMjcmfbU1Uvs509-G5bIcbR2QTQU4K0.css"/> <link rel="stylesheet" media="print" href="/web/20230928042151cs_/https://www.nist.gov/sites/default/files/css/css_zbjDhj-AmeVwgu9y0DlPwEfp7l-a5BpoK3MpoGmRB6o.css"/> <link rel="stylesheet" media="all" href="/web/20230928042151cs_/https://www.nist.gov/sites/default/files/css/css_PV0KmreUx3hVeYI6yGypf71UDz9BSQl1Z5DjiESDh-Y.css"/> <link rel="stylesheet" media="screen" href="/web/20230928042151cs_/https://www.nist.gov/sites/default/files/css/css_FXibUwfgVwlw4rjkYD-esMDIANHdek4UYQzEgNcqBEY.css"/> <script src="/web/20230928042151js_/https://www.nist.gov/sites/default/files/js/js_VDwaIMNiRtzQn-NZvj1F9loIzJ-i4yEDiruzS8Z6Ejo.js"></script> </head> <body class="node-1084771"> <a href="#main-content" class="visually-hidden focusable" data-elastic-exclude> Skip to main content </a> <div class="dialog-off-canvas-main-canvas" data-off-canvas-main-canvas> <!-- nist-index-ignore-start --> <section data-elastic-exclude class="usa-banner" aria-label="Official government website"> <div class="usa-accordion"> <header class="usa-banner__header"> <div class="usa-banner__inner"> <div class="grid-col-auto"> <img class="usa-banner__header-flag" src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/us_flag_small.png" alt="U.S. flag"> </div> <div class="grid-col-fill tablet:grid-col-auto"> <p class="usa-banner__header-text">An official website of the United States government</p> <p class="usa-banner__header-action" aria-hidden="true">Here’s how you know</p> </div> <button class="usa-accordion__button usa-banner__button" aria-expanded="false" aria-controls="gov-banner-default"> <span class="usa-banner__button-text">Here’s how you know</span> </button> </div> </header> <div class="usa-banner__content usa-accordion__content" id="gov-banner-default"> <div class="grid-row grid-gap-lg"> <div class="usa-banner__guidance tablet:grid-col-6"> <img class="usa-banner__icon usa-media-block__img" src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/icon-dot-gov.svg" role="img" alt="" aria-hidden="true"> <div class="usa-media-block__body"> <p> <strong>Official websites use .gov</strong> <br/> A <strong>.gov</strong> website belongs to an official government organization in the United States. </p> </div> </div> <div class="usa-banner__guidance tablet:grid-col-6"> <img class="usa-banner__icon usa-media-block__img" src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/icon-https.svg" role="img" alt="" aria-hidden="true"> <div class="usa-media-block__body"> <p> <strong>Secure .gov websites use HTTPS</strong> <br/> A <strong>lock</strong> ( <span class="icon-lock"> <svg xmlns="http://www.w3.org/2000/svg" width="52" height="64" viewbox="0 0 52 64" class="usa-banner__lock-image" role="img" aria-labelledby="banner-lock-title banner-lock-description" focusable="false"> <title id="banner-lock-title">Lock</title> <desc id="banner-lock-description">A locked padlock</desc><path fill="#000000" fill-rule="evenodd" d="M26 0c10.493 0 19 8.507 19 19v9h3a4 4 0 0 1 4 4v28a4 4 0 0 1-4 4H4a4 4 0 0 1-4-4V32a4 4 0 0 1 4-4h3v-9C7 8.507 15.507 0 26 0zm0 8c-5.979 0-10.843 4.77-10.996 10.712L15 19v9h22v-9c0-6.075-4.925-11-11-11z"/></svg> </span> ) or <strong>https://</strong> means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. </p> </div> </div> </div> </div> </div> </section> <!-- nist-index-ignore-end --> <div data-elastic-exclude> <!-- nist-index-ignore-start --> <div class="nist-print-header" style="display:none;"> <p class="nist-print-header__url">https://www.nist.gov/nist-museum</p> <img class="nist-print-header__logo" width="289" height="38" src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/logo/nist_logo_sidestack.svg" alt="National Institute of Standards and Technology"/> </div> <div class="usa-overlay"></div> <header class="usa-header nist-header--www nist-header--minimal" role="banner"> <div class="usa-navbar"> <div class="usa-logo flex-fill"> <a href="/web/20230928042151/https://www.nist.gov/" title="National Institute of Standards and Technology" aria-label="Home"> <img src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/logo/logo.svg" alt="National Institute of Standards and Technology" width="300px" height="80px"/> </a> </div> <div class="usa-header__right grid-row flex-auto"> <div class="grid-col-fill nist-header__search-group"> <form class="usa-search usa-search--small" accept-charset="UTF-8" action="/web/20230928042151/https://www.nist.gov/search" id="search_form" method="get"> <div role="search"> <label class="usa-sr-only" for="search-form">Search NIST</label> <input class="usa-input" id="search-form" type="search" name="s" placeholder="Search NIST" required="" maxlength="128"> <button class="usa-button" type="submit"><img src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/usa-icons-bg/search--white.svg" class="usa-search__submit-icon" alt="Search"></button> </div> </form> </div> <div class="grid-col-auto padding-left-1"> <button class="usa-menu-btn">Menu</button> </div> </div> </div> <nav aria-label="Primary navigation" class="usa-nav"> <div class="usa-nav__inner"> <button class="usa-nav__close">Close</button> <ul class="usa-nav__primary usa-accordion"> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-1"><span>Topics</span></button> <div id="primary_menu-1" class="usa-nav__submenu usa-megamenu"> <div class="grid-row"> <div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/topics" class="usa-nav__link">All Topics</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/advanced-communications" class="usa-nav__link">Advanced communications</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/artificial-intelligence" class="usa-nav__link">Artificial intelligence</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/bioscience" class="usa-nav__link">Bioscience</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/buildings-construction" class="usa-nav__link">Buildings and construction</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/chemistry" class="usa-nav__link">Chemistry</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/climate" class="usa-nav__link">Climate</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/cybersecurity" class="usa-nav__link">Cybersecurity</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/electronics" class="usa-nav__link">Electronics</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/energy" class="usa-nav__link">Energy</a> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/environment" class="usa-nav__link">Environment</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/fire" class="usa-nav__link">Fire</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/forensic-science" class="usa-nav__link">Forensic science</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/health" class="usa-nav__link">Health</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/information-technology" class="usa-nav__link">Information technology</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/infrastructure" class="usa-nav__link">Infrastructure</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/manufacturing" class="usa-nav__link">Manufacturing</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/materials" class="usa-nav__link">Materials</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/mathematics-statistics" class="usa-nav__link">Mathematics and statistics</a> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/metrology" class="usa-nav__link">Metrology</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/nanotechnology" class="usa-nav__link">Nanotechnology</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/neutron-research" class="usa-nav__link">Neutron research</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/performance-excellence" class="usa-nav__link">Performance excellence</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/physics" class="usa-nav__link">Physics</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/public-safety" class="usa-nav__link">Public safety</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/resilience" class="usa-nav__link">Resilience</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/standards" class="usa-nav__link">Standards</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/transportation" class="usa-nav__link">Transportation</a> </li> </ul> </div> </div> </div> </li> <li class="usa-nav__primary-item"> <a class="usa-nav__link" href="/web/20230928042151/https://www.nist.gov/publications">Publications</a> </li> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-3"><span>Labs & Major Programs</span></button> <div id="primary_menu-3" class="usa-nav__submenu usa-megamenu"> <div class="grid-row"> <div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/labs-major-programs/laboratories" class="usa-nav__link">Laboratories</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20230928042151/https://www.nist.gov/ctl" class="usa-nav__link">Communications Technology Laboratory</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/el" class="usa-nav__link">Engineering Laboratory</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/itl" class="usa-nav__link">Information Technology Laboratory</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/mml" class="usa-nav__link">Material Measurement Laboratory</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/pml" class="usa-nav__link">Physical Measurement Laboratory</a> </li> </ul> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/labs-major-programs/user-facilities" class="usa-nav__link">User Facilities</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20230928042151/https://www.nist.gov/ncnr" class="usa-nav__link">NIST Center for Neutron Research</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/cnst" class="usa-nav__link">CNST NanoFab</a> </li> </ul> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/labs-major-programs/research-test-beds" class="usa-nav__link">Research Test Beds</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/laboratories/projects-programs" class="usa-nav__link">Research Projects</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/laboratories/tools-instruments" class="usa-nav__link">Tools & Instruments</a> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/labs-major-programs/major-programs" class="usa-nav__link">Major Programs</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20230928042151/https://www.nist.gov/baldrige" class="usa-nav__link">Baldrige Performance Excellence Program</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/chips" class="usa-nav__link">CHIPS for America Initiative</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/mep" class="usa-nav__link">Manufacturing Extension Partnership (MEP)</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/oam" class="usa-nav__link">Office of Advanced Manufacturing</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/spo" class="usa-nav__link">Special Programs Office</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/tpo" class="usa-nav__link">Technology Partnerships Office</a> </li> </ul> </li> </ul> </div> </div> </div> </li> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-4"><span>Services & Resources</span></button> <div id="primary_menu-4" class="usa-nav__submenu usa-megamenu"> <div class="grid-row"> <div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/services-resources/standards-and-measurements" class="usa-nav__link">Standards and Measurements</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20230928042151/https://www.nist.gov/calibrations" class="usa-nav__link">Calibration Services</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/nvlap" class="usa-nav__link">Laboratory Accreditation (NVLAP)</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/nist-quality-system" class="usa-nav__link">Quality System</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/srm" class="usa-nav__link">Standard Reference Materials (SRMs)</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/standardsgov" class="usa-nav__link">Standards.gov</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/pml/time-and-frequency-division/time-services" class="usa-nav__link">Time Services</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/pml/owm" class="usa-nav__link">Office of Weights and Measures</a> </li> </ul> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/services-resources/software" class="usa-nav__link">Software</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/data" class="usa-nav__link">Data</a> <ul class="usa-nav__submenu-list"> <li> <a href="https://web.archive.org/web/20230928042151/https://webbook.nist.gov/chemistry/" class="usa-nav__link">Chemistry WebBook</a> </li> <li> <a href="https://web.archive.org/web/20230928042151/https://nvd.nist.gov/" class="usa-nav__link">National Vulnerability Database</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/pml/productsservices/physical-reference-data" class="usa-nav__link">Physical Reference Data</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/srd" class="usa-nav__link">Standard Reference Data (SRD)</a> </li> </ul> </li> <li class="usa-nav__submenu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/shop" class="usa-nav__link">Storefront</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/tpo" class="usa-nav__link">License & Patents</a> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="https://web.archive.org/web/20230928042151/https://csrc.nist.gov/" class="usa-nav__link">Computer Security Resource Center (CSRC)</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/nist-research-library" class="usa-nav__link">NIST Research Library</a> </li> </ul> </div> </div> </div> </li> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-5"><span>News & Events</span></button> <div id="primary_menu-5" class="usa-nav__submenu usa-megamenu"> <div class="grid-row"> <div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/news-events/news" class="usa-nav__link">News</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/news-events/events" class="usa-nav__link">Events</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/blogs" class="usa-nav__link">Blogs</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/feature-stories" class="usa-nav__link">Feature Stories</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/awards" class="usa-nav__link">Awards</a> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/video-gallery" class="usa-nav__link">Video Gallery</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/image-gallery" class="usa-nav__link">Image Gallery</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/pao/media-contacts" class="usa-nav__link">Media Contacts</a> </li> </ul> </div> </div> </div> </li> <li class="usa-nav__primary-item"> <button class="usa-accordion__button usa-nav__link usa-current" aria-expanded="false" aria-controls="primary_menu-6"><span>About NIST</span></button> <div id="primary_menu-6" class="usa-nav__submenu usa-megamenu"> <div class="grid-row"> <div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/about-nist" class="usa-nav__link">About Us</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/about-nist/contact-us" class="usa-nav__link">Contact Us</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/about-nist/visit" class="usa-nav__link">Visit</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/careers" class="usa-nav__link">Careers</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/director/nist-organization-structure" class="usa-nav__link">Our Organization</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20230928042151/https://www.nist.gov/director" class="usa-nav__link">Office of the Director</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/director/nist-organization-structure/budget-planning" class="usa-nav__link">Budget & Planning</a> </li> </ul> </li> </ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list"> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/about-nist/work-nist" class="usa-nav__link">Work with NIST</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/history" class="usa-nav__link usa-current">History</a> <ul class="usa-nav__submenu-list"> <li> <a href="https://web.archive.org/web/20230928042151/http://nistdigitalarchives.contentdm.oclc.org/" class="usa-nav__link">NIST Digital Archives</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/nist-museum" class="usa-nav__link usa-current">NIST Museum</a> </li> <li> <a href="/web/20230928042151/https://www.nist.gov/nist-and-nobel" class="usa-nav__link">NIST and the Nobel</a> </li> </ul> </li> <li class="usa-nav__submenu-item"> <a href="/web/20230928042151/https://www.nist.gov/education" class="usa-nav__link">Educational Resources</a> </li> </ul> </div> </div> </div> </li> </ul> </div> </nav> </header> <!-- nist-index-ignore-end --> </div> <div class="grid-container"> <div data-drupal-messages-fallback class="hidden"></div> </div> <div id="block-nist-www-content" class="nist-block"> <section class="nist-page__content usa-section clearfix"> <a id="main-content" tabindex="-1"></a> <div class="nist-section-header nist-section-header--menu"> <div class="nist-section-header__main grid-container"> <div class="grid-row"> <div class="nist-section-header__title tablet-lg:grid-col-4"> <h1 class="nist-page__title">NIST Museum and Archives</h1> </div> <div class="nist-section-header__desc tablet-lg:grid-col-8"> <div class="text-with-summary"> <p>The NIST Museum and Archives, as part of the NIST Research Library and Museum, aims to increase awareness of the achievements and history of NIST through research, collection, and exhibition of scientific instruments, archival materials, and other historical artifacts.</p> </div> </div> </div> </div> </div> <div class="grid-container margin-top-4"> <div class="grid-row grid-gap-6"> <aside class="nist-page__region nist-page__region--sidebar-first tablet-lg:grid-col-4 desktop-lg:grid-col-3"> <div> <!-- nist-index-ignore-start --> <div data-elastic-exclude="" class="nist-block"> <nav> <ul class="usa-sidenav usa-accordion "> <li class="usa-sidenav__item"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/about" data-drupal-link-system-path="">About</a> </li> <li class="usa-sidenav__item usa-sidenav__item--parent"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/museum-collection" data-drupal-link-system-path="">Museum Collection</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-nist-museum-2"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-nist-museum-2" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/museum-collection/exhibits" data-drupal-link-system-path="">Exhibits</a> </li> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/beautiful-measures-exhibit" data-drupal-link-system-path="">Beautiful Measures Exhibit</a> </li> <li class="usa-sidenav__item"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/museum-collection/archived-digital-exhibits" data-drupal-link-system-path="">Archived Digital Exhibits</a> </li> </ul> </li> <li class="usa-sidenav__item usa-sidenav__item--parent"> <a href="https://web.archive.org/web/20230928042151/http://nist.gov/digitalarchives" data-drupal-link-system-path="">NIST Digital Archives</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-nist-museum-3"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-nist-museum-3" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/https://nistdigitalarchives.contentdm.oclc.org/digital/collection/p16009coll19" data-drupal-link-system-path="">Historic Photographs</a> </li> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/https://nistdigitalarchives.contentdm.oclc.org/digital/collection/p15421coll3" data-drupal-link-system-path="">Museum Artifacts</a> </li> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/https://nistdigitalarchives.contentdm.oclc.org/digital/collection/p16009coll4" data-drupal-link-system-path="">NIST Publications</a> </li> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/http://nistdigitalarchives.contentdm.oclc.org/cdm/landingpage/collection/p16009coll44" data-drupal-link-system-path="">Special Collections</a> </li> </ul> </li> <li class="usa-sidenav__item usa-sidenav__item--parent"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/nist-history" data-drupal-link-system-path="">NIST History</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-nist-museum-4"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-nist-museum-4" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/nist-history/history-publications" data-drupal-link-system-path="">History Publications</a> </li> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/timeline#event-a-href-node-774241nist-founded-a" data-drupal-link-system-path="">Timeline</a> </li> <li class="usa-sidenav__item"> <a href="/web/20230928042151/https://www.nist.gov/nist-museum/nist-history/nist-biographies" data-drupal-link-system-path="">NIST Biographies</a> </li> </ul> </li> <li class="usa-sidenav__item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-research-library" data-drupal-link-system-path="">NIST Research Library</a> </li> </ul> </nav> </div> <!-- nist-index-ignore-end --> </div> </aside> <div class="nist-page__region nist-page__region--content tablet-lg:grid-col-8 desktop-lg:grid-col-9"> <div class="nist-block"> <div class="nist-content-row nist-content-row--width-legible paragraph paragraph--type--text paragraph--view-mode--default"> <div class="nist-block text-long"><h2><span><span><span>Welcome to the NIST Museum and Archives!</span></span></span></h2></div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-12 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nanotechnology/nist-and-nanosoccer"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2023/05/03/Thumbnail-01_0.png.webp?itok=6IQv7Vqx 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/2400_wide/public/images/2023/05/03/Thumbnail-01_0.png.webp?itok=Oh-zQab6 2x" media="(min-width: 1200px)" type="image/webp" width="1200" height="750"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2023/05/03/Thumbnail-01_0.png.webp?itok=I68hfPC0 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2023/05/03/Thumbnail-01_0.png.webp?itok=6IQv7Vqx 2x" media="(min-width: 480px)" type="image/webp" width="600" height="375"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300_wide/public/images/2023/05/03/Thumbnail-01_0.png.webp?itok=lblsKLz8 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2023/05/03/Thumbnail-01_0.png.webp?itok=I68hfPC0 2x" media="(min-width: 0px)" type="image/webp" width="300" height="188"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2023/05/03/Thumbnail-01_0.png.jpg?itok=6IQv7Vqx" width="1200" height="750" alt="World's Smallest Soccer Field Exhibit: Nano Robots Take the Field exhibit title thumbnail" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nanotechnology/nist-and-nanosoccer"> <div class="text">Featured Exhibit</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-12 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/videodiscs-and-scanning-capacitance-microscope-failed-consumer-product-solves"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.webp?itok=xCN9Jl2J 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/2400_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.webp?itok=_cKK5_3i 2x" media="(min-width: 1200px)" type="image/webp" width="1200" height="231"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.webp?itok=RcjclhiH 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.webp?itok=xCN9Jl2J 2x" media="(min-width: 480px)" type="image/webp" width="600" height="115"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.webp?itok=v0RpmD7l 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.webp?itok=RcjclhiH 2x" media="(min-width: 0px)" type="image/webp" width="300" height="58"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2023/04/05/Narrative%20in%20the%20round-VideoDiscs-01.png.jpg?itok=xCN9Jl2J" width="1200" height="231" alt="Videodiscs and the Scanning Capacitance Microscope exhibit tile" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/videodiscs-and-scanning-capacitance-microscope-failed-consumer-product-solves"> <div class="text">Featured Exhibit</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-12 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/luminous-script-signs-origins-neon-sign"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.webp?itok=P5AYOCRV 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/2400_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.webp?itok=FEtZHwna 2x" media="(min-width: 1200px)" type="image/webp" width="1200" height="295"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.webp?itok=22dJivEP 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.webp?itok=P5AYOCRV 2x" media="(min-width: 480px)" type="image/webp" width="600" height="147"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.webp?itok=SAZxocXT 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.webp?itok=22dJivEP 2x" media="(min-width: 0px)" type="image/webp" width="300" height="74"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2022/09/28/Luminous%20Script%20Signs%20V.Exhibit%20Title.png.jpg?itok=P5AYOCRV" width="1200" height="295" alt="Luminous Script Signs: The Origin of the 'Neon Sign' Title Banner" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/luminous-script-signs-origins-neon-sign"> <div class="text">Featured Exhibit</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-12 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/forgotten-radium-scientists"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.webp?itok=so6Iu5nR 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/2400_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.webp?itok=HzjliySI 2x" media="(min-width: 1200px)" type="image/webp" width="1200" height="404"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.webp?itok=ejXnVz-B 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.webp?itok=so6Iu5nR 2x" media="(min-width: 480px)" type="image/webp" width="600" height="202"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.webp?itok=upMHky_s 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.webp?itok=ejXnVz-B 2x" media="(min-width: 0px)" type="image/webp" width="300" height="101"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2022/04/20/Exhibit%20Title%20Teaser-01.png.jpg?itok=so6Iu5nR" width="1200" height="404" alt="The Forgotten Radium Scientists Title Teaser with Damon, Torrey, Bower, Yung-Kwai, and Alderton portraits" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/forgotten-radium-scientists"> <div class="text">Featured Exhibit</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-12 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/nists-120th-anniversary"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.webp?itok=48K1GTjQ 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/2400_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.webp?itok=ETJWgppO 2x" media="(min-width: 1200px)" type="image/webp" width="1200" height="344"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.webp?itok=Y7jhse2Y 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.webp?itok=48K1GTjQ 2x" media="(min-width: 480px)" type="image/webp" width="600" height="172"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.webp?itok=KuTiEOBF 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.webp?itok=Y7jhse2Y 2x" media="(min-width: 0px)" type="image/webp" width="300" height="86"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200_wide/public/images/2021/09/14/NIST120thAnnThumbnail-01.png.jpg?itok=48K1GTjQ" width="1200" height="344" alt="NIST's 120th Anniversary Celebrating 13 Moments in NIST History, A Special NIST Museum Exhibit" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/nists-120th-anniversary"> <div class="text">Featured Exhibit</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/pandemic-poet-and-other-tales-nist-genealogy-project"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2021/05/20/Hero%20pic_Poet%20and%20Other%20Tales-01.png.webp?itok=60t8pIyd 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200w_x_720h/public/images/2021/05/20/Hero%20pic_Poet%20and%20Other%20Tales-01.png.webp?itok=jWwF6tvr 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300w_x_180h/public/images/2021/05/20/Hero%20pic_Poet%20and%20Other%20Tales-01.png.webp?itok=thGSPWgb 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2021/05/20/Hero%20pic_Poet%20and%20Other%20Tales-01.png.webp?itok=60t8pIyd 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2021/05/20/Hero%20pic_Poet%20and%20Other%20Tales-01.png.jpg?itok=60t8pIyd" width="600" height="360" alt="Hero Image for The Pandemic Poet and Other Tales exhibit" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/pandemic-poet-and-other-tales-nist-genealogy-project"> <div class="text">New Exhibit</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/landmarks-history-natural-catastrophe-modeling"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/07/09/3-Panels-Title.jpg.webp?itok=ph1OM7T5 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200w_x_720h/public/images/2020/07/09/3-Panels-Title.jpg.webp?itok=4E6z2dDV 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300w_x_180h/public/images/2020/07/09/3-Panels-Title.jpg.webp?itok=jr0DSYsm 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/07/09/3-Panels-Title.jpg.webp?itok=ph1OM7T5 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/07/09/3-Panels-Title.jpg.jpg?itok=ph1OM7T5" width="600" height="360" alt="Title: Landmarks in the History of Natural Catastrophe Modeling: An exhibit from Johns Hopkins University and the NIST Museum; Quote: “In catastrophe modeling, the length of the list of unknowns makes one very humble… but decisions must still be made, if only on order of magnitude estimates.” — Don G. Friedman; Graphics of the Don G. Friedman calculating risk formula" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/landmarks-history-natural-catastrophe-modeling"> <div class="text">New Exhibit</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/fare-fair-taximeter-testing-1920s-and-today"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/09/10/Hero%20pic_Is%20the%20Fare%20Fair_0.png.webp?itok=9skESduG 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200w_x_720h/public/images/2020/09/10/Hero%20pic_Is%20the%20Fare%20Fair_0.png.webp?itok=n_yD2K47 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300w_x_180h/public/images/2020/09/10/Hero%20pic_Is%20the%20Fare%20Fair_0.png.webp?itok=emnE5qMz 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/09/10/Hero%20pic_Is%20the%20Fare%20Fair_0.png.webp?itok=9skESduG 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/09/10/Hero%20pic_Is%20the%20Fare%20Fair_0.png.jpg?itok=9skESduG" width="600" height="360" alt="Is the Fare Fair? exhibit Hero image for exhibit link. Black and White image of 1921 Checker taxi in Washington, D.C. with the exhibit title 'Is the Fare Fair? Taximeter Testing in the 1920s and Today' in yellow at the top of the image." typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/fare-fair-taximeter-testing-1920s-and-today"> <div class="text">New Exhibit</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/nist-history"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/rabinow2_1_1.jpg.webp?itok=rpPdnMw- 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200w_x_720h/public/images/2016/09/22/rabinow2_1_1.jpg.webp?itok=2nVf88KJ 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300w_x_180h/public/images/2016/09/22/rabinow2_1_1.jpg.webp?itok=KURwIi7G 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/rabinow2_1_1.jpg.webp?itok=rpPdnMw- 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/rabinow2_1_1.jpg.jpg?itok=rpPdnMw-" width="600" height="360" alt="Jacob Rabinow" title="Jacob Rabinow" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/nist-history"> <div class="text">NIST History</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://nistdigitalarchives.contentdm.oclc.org/"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/ndascreenshot_1.png.webp?itok=rpSk0uJ9 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200w_x_720h/public/images/2016/09/22/ndascreenshot_1.png.webp?itok=es954BQg 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300w_x_180h/public/images/2016/09/22/ndascreenshot_1.png.webp?itok=f8tafCeR 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/ndascreenshot_1.png.webp?itok=rpSk0uJ9 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/ndascreenshot_1.png.jpg?itok=rpSk0uJ9" width="600" height="360" alt="NIST Digital Archives" title="NIST Digital Archives" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://nistdigitalarchives.contentdm.oclc.org/"> <div class="text">NIST Digital Archives</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/museum-collection/exhibits"> <picture> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/exhibits.jpg.webp?itok=GFa1V062 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/1200w_x_720h/public/images/2016/09/22/exhibits.jpg.webp?itok=D60iBye4 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/300w_x_180h/public/images/2016/09/22/exhibits.jpg.webp?itok=adOGU2Ua 1x, /web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/exhibits.jpg.webp?itok=GFa1V062 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/web/20230928042151im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2016/09/22/exhibits.jpg.jpg?itok=GFa1V062" width="600" height="360" alt="Museum Exhibits" typeof="foaf:Image"/> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-museum/museum-collection/exhibits"> <div class="text">Museum Exhibits</div> </a> </div> </div> </div> </div> </div> </div> </div> </div> </div> <div class="grid-container"> <div class="nist-page__region nist-page__region--content-bottom"> <div class="nist-block nist-block--contact"> <h2 class="nist-block__title">Contacts</h2> <div class="nist-contact"> <ul class="nist-contact__items"> <li class="nist-contact__item"> <div class="nist-contact__name"> NIST Research Library & Museum </div> <div> <a href="https://web.archive.org/web/20230928042151/mailto:museum@nist.gov">museum@nist.gov</a> </div> <div> (301) 975-3052 </div> <div> </div> </li> </ul> </div> </div> </div> </div> </section> </div> <div data-elastic-exclude> <!-- nist-index-ignore-start --> <footer class="nist-footer padding-bottom-4"> <div class="grid-container nist-footer__info"> <div class="grid-row"> <div class="tablet:grid-col-6"> <div class="nist-footer__logo"> <a href="/web/20230928042151/https://www.nist.gov/" title="National Institute of Standards and Technology" rel="home"> <img class="nist-footer__logo-img" src="/web/20230928042151im_/https://www.nist.gov/libraries/nist-component-library/dist/img/logo/NIST-Logo-Brand-White.svg" alt="National Institute of Standards and Technology logo" width="300px" height="42px"/> </a> </div> <div class="nist-footer__contact"> <h3 class="nist-footer__contact-heading">HEADQUARTERS</h3> <address> 100 Bureau Drive<br> Gaithersburg, MD 20899<br> <a href="https://web.archive.org/web/20230928042151/tel:301-975-2000">301-975-2000</a> </address> <p> <a href="https://web.archive.org/web/20230928042151/mailto:do-webmaster@nist.gov">Webmaster</a> | <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/about-nist/contact-us">Contact Us</a> | <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/visit">Our Other Offices</a> </p> </div> </div> <div class="tablet:grid-col-6"> <div class="nist-footer__social-links"> <a class="nist-social nist-social--twitter-white" href="https://web.archive.org/web/20230928042151/https://twitter.com/NIST"> <span>Twitter</span> </a> <a class="nist-social nist-social--facebook-white" href="https://web.archive.org/web/20230928042151/https://www.facebook.com/NIST"> <span>Facebook</span> </a> <a class="nist-social nist-social--linkedin-white" href="https://web.archive.org/web/20230928042151/https://www.linkedin.com/company/nist"> <span>LinkedIn</span> </a> <a class="nist-social nist-social--instagram-white" href="https://web.archive.org/web/20230928042151/https://www.instagram.com/nist/"> <span>Instagram</span> </a> <a class="nist-social nist-social--youtube-white" href="https://web.archive.org/web/20230928042151/https://www.youtube.com/NIST"> <span>YouTube</span> </a> <a class="nist-social nist-social--giphy-white" href="https://web.archive.org/web/20230928042151/https://giphy.com/nist"> <span>Giphy</span> </a> <a class="nist-social nist-social--rss-white" href="https://web.archive.org/web/20230928042151/https://www.nist.gov/news-events/nist-rss-feeds"> <span>RSS Feed</span> </a> <a class="nist-social nist-social--envelope-white" href="https://web.archive.org/web/20230928042151/https://public.govdelivery.com/accounts/USNIST/subscriber/new"> <span>Mailing List</span> </a> </div> <div class="nist-footer__feedback"> How are we doing? <a class="usa-button" rel="nofollow" href="/web/20230928042151/https://www.nist.gov/form/nist-gov-feedback?destination=/nist-museum" title="Provide feedback">Feedback</a> </div> </div> </div> </div> <div class="grid-container"> <div class="nist-footer__nav" role="navigation"> <ul> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/privacy-policy">Site Privacy</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/oism/accessibility">Accessibility</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/privacy">Privacy Program</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/oism/copyrights">Copyrights</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.commerce.gov/vulnerability-disclosure-policy">Vulnerability Disclosure</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/no-fear-act-policy">No Fear Act Policy</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/office-director/freedom-information-act">FOIA</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/environmental-policy-statement">Environmental Policy</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/summary-report-scientific-integrity">Scientific Integrity</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.nist.gov/nist-information-quality-standards">Information Quality Standards</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://www.commerce.gov/">Commerce.gov</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/http://www.science.gov/">Science.gov</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/http://www.usa.gov/">USA.gov</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20230928042151/https://vote.gov/">Vote.gov</a> </li> </ul> </div> </div> </footer> <!-- nist-index-ignore-end --> </div> </div> <script type="application/json" data-drupal-selector="drupal-settings-json">{"path":{"baseUrl":"\/","scriptPath":null,"pathPrefix":"","currentPath":"node\/1084771","currentPathIsAdmin":false,"isFront":false,"currentLanguage":"en"},"pluralDelimiter":"\u0003","suppressDeprecationErrors":true,"ajaxPageState":{"theme":"nist_www","libraries":"back_to_top\/back_to_top_icon,back_to_top\/back_to_top_js,core\/picturefill,extlink\/drupal.extlink,figcaption_filter\/figcaption,google_analytics\/google_analytics,nist\/equal_height,nist\/global,nist\/global-js,nist\/header-js,nist_linkit_filter\/nist_linkit_filter_ga,nist_siteimprove\/nist_siteimprove_js,nist_theme_toolbar_mod\/disable_link,nist_www\/global,nist_www\/global-js,nist_www\/microsite,paragraphs\/drupal.paragraphs.unpublished,system\/base"},"back_to_top":{"back_to_top_button_trigger":100,"back_to_top_prevent_on_mobile":false,"back_to_top_prevent_in_admin":true,"back_to_top_button_type":"image","back_to_top_button_text":"Back to top"},"google_analytics":{"account":"G-HEQ0YF2VYL","trackOutbound":true,"trackMailto":true,"trackTel":true,"trackDownload":true,"trackDownloadExtensions":"7z|aac|arc|arj|asf|asx|avi|bin|bsh|c|csv|doc(x|m)?|dot(x|m)?|dw(fx|g|gd)|dxf|eps|epub|exe|f(90)|flv|gif|gz|gzip|hqx|jar|jpe?g|js|m1v|mp(2|3|4|e?g)|mobi|mov(ie)?|msi|msp|pdf|phps|pl|png|ppt(x|m)?|pot(x|m)?|pps(x|m)?|ppam|sld(x|m)?|thmx|qtm?|ra(m|r)?|rfa|rtf|rvt|sch|sea|sit|swf|tar|tgz|tif|txt|txz|wav|wma|wmv|wpd|wrl|xls(x|m|b)?|xlt(x|m)|xlam|xml|xsd|z|zip"},"nist_search":{"clickTracking":"search-report-click","isDebug":false,"clickTrackEnabled":true,"message":"NIST Search in debug mode. Check the browsers network inspector for Click Track reporting results..."},"data":{"extlink":{"extTarget":false,"extTargetNoOverride":false,"extNofollow":false,"extNoreferrer":false,"extFollowNoOverride":false,"extClass":"ext","extLabel":"(link is external)","extImgClass":false,"extSubdomains":true,"extExclude":"\\.gov\\\/|\\.mil\\\/|\\manufacturingusa\\.com\\\/","extInclude":"","extCssExclude":"","extCssExplicit":"","extAlert":true,"extAlertText":"Thank you for visiting NIST. We hope your visit was informative. We have provided a link to this site because it has information that may be of interest to our users. NIST does not necessarily endorse the views expressed or the facts presented on this site. Further, NIST does not endorse any commercial products that may be advertised or available on this site. Click OK to be directed to your link.","mailtoClass":"0","mailtoLabel":"(link sends email)","extUseFontAwesome":false,"extIconPlacement":"append","extFaLinkClasses":"fa fa-external-link","extFaMailtoClasses":"fa fa-envelope-o","whitelistedDomains":[]}},"user":{"uid":0,"permissionsHash":"582eea317b4636ab5a0dffc8c6a006df3d6901ea5610498a0bbefc925ea1da0f"}}</script> <script src="/web/20230928042151js_/https://www.nist.gov/sites/default/files/js/js_TWNv9cx7L2u6xOmxjWFvEVVx5eqI8FiA4zHHfFssVso.js"></script> <script src="https://web.archive.org/web/20230928042151js_/https://siteimproveanalytics.com/js/siteanalyze_6017546.js" async></script> <script src="/web/20230928042151js_/https://www.nist.gov/sites/default/files/js/js_-7w3JusuRaaB46cS-o2sKvVuKufIlPFmpPV3es8rkoU.js"></script> <script type="text/javascript">window.NREUM||(NREUM={});NREUM.info={"beacon":"gov-bam.nr-data.net","licenseKey":"37b7ccb661","applicationID":"1089704227","transactionName":"YFxUN0sADEdYVkBaClkWdwBNCA1aFkVVVABoWlcAUQQ=","queueTime":4,"applicationTime":39,"atts":"TBtXQQMaH0k=","errorBeacon":"gov-bam.nr-data.net","agent":""}</script></body> </html> <!-- FILE ARCHIVED ON 04:21:51 Sep 28, 2023 AND RETRIEVED FROM THE INTERNET ARCHIVE ON 20:57:31 Nov 28, 2024. JAVASCRIPT APPENDED BY WAYBACK MACHINE, COPYRIGHT INTERNET ARCHIVE. ALL OTHER CONTENT MAY ALSO BE PROTECTED BY COPYRIGHT (17 U.S.C. SECTION 108(a)(3)). --> <!-- playback timings (ms): captures_list: 0.652 exclusion.robots: 0.05 exclusion.robots.policy: 0.017 esindex: 0.013 cdx.remote: 5.042 LoadShardBlock: 257.652 (3) PetaboxLoader3.resolve: 354.346 (4) PetaboxLoader3.datanode: 75.212 (4) load_resource: 220.314 -->