CINXE.COM

Infrastructure | 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="https://web-static.archive.org/_static/js/bundle-playback.js?v=7YQSqjSh" charset="utf-8"></script> <script type="text/javascript" src="https://web-static.archive.org/_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="https://web-static.archive.org/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("https://www.nist.gov/infrastructure","20211128174231","https://web.archive.org/","web","https://web-static.archive.org/_static/", "1638121351"); </script> <link rel="stylesheet" type="text/css" href="https://web-static.archive.org/_static/css/banner-styles.css?v=p7PEIJWi" /> <link rel="stylesheet" type="text/css" href="https://web-static.archive.org/_static/css/iconochive.css?v=3PDvdIFv" /> <!-- End Wayback Rewrite JS Include --> <meta charset="utf-8"/> <noscript><style>form.antibot * :not(.antibot-message) { display: none !important; }</style> </noscript><script>(function(i,s,o,g,r,a,m){i["GoogleAnalyticsObject"]=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,"script","https://web.archive.org/web/20211128174231/https://www.google-analytics.com/analytics.js","ga");ga("create", "UA-66610693-3", {"cookieDomain":"auto"});ga("require", "linkid", "linkid.js");ga("set", "anonymizeIp", true);ga("set", "dimension2", "Infrastructure");ga("set", "dimension3", "1144781");ga("set", "dimension7", "Topic Landing Page");ga("send", "pageview");ga('create', 'UA-33523145-1', 'auto', 'NISTGSA'); ga('NISTGSA.send', 'pageview');</script> <link rel="canonical" href="https://web.archive.org/web/20211128174231/https://www.nist.gov/infrastructure"/> <link rel="shortlink" href="https://web.archive.org/web/20211128174231/https://www.nist.gov/node/1144781"/> <meta name="description" content="NIST supports the safety, interoperability, and resilience of the Nation’s core infrast"/> <meta name="dcterms.title" content="Infrastructure"/> <meta name="dcterms.creator" content="robin.materese@nist.gov"/> <meta name="dcterms.description" content="NIST supports the safety, interoperability, and resilience of the Nation’s core infrast"/> <meta name="dcterms.date" content="2017-01-31T08:46-05:00"/> <meta name="dcterms.type" content="text"/> <meta name="dcterms.format" content="text/html"/> <meta name="dcterms.identifier" content="https://www.nist.gov/infrastructure"/> <meta name="dcterms.modified" content="2021-03-19T16:42-04:00"/> <meta property="og:site_name" content="NIST"/> <meta property="og:type" content="Article"/> <meta property="og:url" content="https://web.archive.org/web/20211128174231/https://www.nist.gov/infrastructure"/> <meta property="og:title" content="Infrastructure"/> <meta property="og:description" content="NIST supports the safety, interoperability, and resilience of the Nation’s core infrast"/> <meta property="og:image" content="https://web.archive.org/web/20211128174231im_/https://www.nist.gov/sites/default/files/images/2017/01/26/smithfield_bridge_credit_brook_ward_cc2.jpg"/> <meta property="article:modified_time" content="2021-03-19T16:42:45-04:00"/> <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"/> <link rel="shortcut icon" href="/web/20211128174231im_/https://www.nist.gov/themes/custom/nist_www/favicon.ico" type="image/vnd.microsoft.icon"/> <title>Infrastructure | NIST</title> <link rel="stylesheet" media="all" href="/web/20211128174231cs_/https://www.nist.gov/sites/default/files/css/css_F2gAVVlSdR3arDUpXp31o79SNgjcEodwd2bnXsnktzU.css"/> <link rel="stylesheet" media="screen" href="/web/20211128174231cs_/https://www.nist.gov/sites/default/files/css/css_-dpOhjcTezsOR8dH2bHBThYQ7LGXlB9VRPjMxIjpC9Y.css"/> <link rel="stylesheet" media="print" href="/web/20211128174231cs_/https://www.nist.gov/sites/default/files/css/css_zbjDhj-AmeVwgu9y0DlPwEfp7l-a5BpoK3MpoGmRB6o.css"/> <link rel="stylesheet" media="all" href="/web/20211128174231cs_/https://www.nist.gov/sites/default/files/css/css_PV0KmreUx3hVeYI6yGypf71UDz9BSQl1Z5DjiESDh-Y.css"/> <link rel="stylesheet" media="screen" href="/web/20211128174231cs_/https://www.nist.gov/sites/default/files/css/css_Sdgu2jLipWXWxjRKe-8-85omf1EpGGzxyUbFz54QSU0.css"/> <script src="https://web.archive.org/web/20211128174231js_/https://script.crazyegg.com/pages/scripts/0039/8570.js" async></script> <script src="/web/20211128174231js_/https://www.nist.gov/sites/default/files/js/js_-dbYZ4JxrJ1JstYSHl6hMbgz-yFcPPqDY0VSXVJZCIo.js"></script> </head> <body class="node-1144781"> <a href="#main-content" class="visually-hidden focusable"> Skip to main content </a> <div class="dialog-off-canvas-main-canvas" data-off-canvas-main-canvas> <!-- nist-index-ignore-start --> <section 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/20211128174231im_/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/20211128174231im_/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/20211128174231im_/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 --> <!-- nist-index-ignore-start --> <div class="nist-print-header" style="display:none;"> <p class="nist-print-header__url">https://www.nist.gov/infrastructure</p> <img class="nist-print-header__logo" width="289" height="38" src="/web/20211128174231im_/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/20211128174231/https://www.nist.gov/" title="National Institute of Standards and Technology" aria-label="Home"> <img src="/web/20211128174231im_/https://www.nist.gov/libraries/nist-component-library/dist/img/logo/logo.svg" alt="National Institute of Standards and Technology"/> </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="https://web.archive.org/web/20211128174231/https://www.nist.gov/fusion-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=""> <button class="usa-button" type="submit"><span class="usa-sr-only">Search</span></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 usa-current" 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/20211128174231/https://www.nist.gov/topics" class="usa-nav__link">All Topics</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/advanced-communications" class="usa-nav__link">Advanced communications</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/artificial-intelligence" class="usa-nav__link">Artificial intelligence</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/bioscience" class="usa-nav__link">Bioscience</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/buildings-construction" class="usa-nav__link">Buildings and construction</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/chemistry" class="usa-nav__link">Chemistry</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/climate" class="usa-nav__link">Climate</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/cybersecurity" class="usa-nav__link">Cybersecurity</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/electronics" class="usa-nav__link">Electronics</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/environment" class="usa-nav__link">Environment</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/fire" class="usa-nav__link">Fire</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/forensic-science" class="usa-nav__link">Forensic science</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/health" class="usa-nav__link">Health</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/information-technology" class="usa-nav__link">Information technology</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/infrastructure" class="usa-nav__link usa-current">Infrastructure</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/manufacturing" class="usa-nav__link">Manufacturing</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/materials" class="usa-nav__link">Materials</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/metrology" class="usa-nav__link">Metrology</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/nanotechnology" class="usa-nav__link">Nanotechnology</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/neutron-research" class="usa-nav__link">Neutron research</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/performance-excellence" class="usa-nav__link">Performance excellence</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/physics" class="usa-nav__link">Physics</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/public-safety" class="usa-nav__link">Public safety</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/resilience" class="usa-nav__link">Resilience</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/standards" class="usa-nav__link">Standards</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/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 &amp; 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/20211128174231/https://www.nist.gov/labs-major-programs/laboratories" class="usa-nav__link">Laboratories</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20211128174231/https://www.nist.gov/ctl" class="usa-nav__link">Communications Technology Laboratory</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/el" class="usa-nav__link">Engineering Laboratory</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/itl" class="usa-nav__link">Information Technology Laboratory</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/mml" class="usa-nav__link">Material Measurement Laboratory</a> </li> <li> <a href="/web/20211128174231/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/20211128174231/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/20211128174231/https://www.nist.gov/ncnr" class="usa-nav__link">NIST Center for Neutron Research</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/cnst" class="usa-nav__link">CNST NanoFab</a> </li> </ul> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/laboratories/projects-programs" class="usa-nav__link">Research Projects</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/laboratories/tools-instruments" class="usa-nav__link">Tools &amp; 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/20211128174231/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/20211128174231/https://www.nist.gov/baldrige" class="usa-nav__link">Baldrige Performance Excellence Program</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/mep" class="usa-nav__link">Manufacturing Extension Partnership (MEP)</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/oam" class="usa-nav__link">Office of Advanced Manufacturing</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/special-programs-office-spo" class="usa-nav__link">Special Programs Office</a> </li> <li> <a href="/web/20211128174231/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 &amp; 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/20211128174231/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/20211128174231/https://www.nist.gov/calibrations" class="usa-nav__link">Calibration Services</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/nvlap" class="usa-nav__link">Laboratory Accreditation (NVLAP)</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/nist-quality-system" class="usa-nav__link">Quality System</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/srm" class="usa-nav__link">Standard Reference Materials (SRMs)</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/standardsgov" class="usa-nav__link">Standards.gov</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/pml/time-and-frequency-division/time-services" class="usa-nav__link">Time Services</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/pml/weights-and-measures" 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/20211128174231/https://www.nist.gov/services-resources/software" class="usa-nav__link">Software</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/https://webbook.nist.gov/chemistry/" class="usa-nav__link">Chemistry WebBook</a> </li> <li> <a href="https://web.archive.org/web/20211128174231/https://nvd.nist.gov/" class="usa-nav__link">National Vulnerability Database</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/pml/productsservices/physical-reference-data" class="usa-nav__link">Physical Reference Data</a> </li> <li> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/shop" class="usa-nav__link">Storefront</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/tpo" class="usa-nav__link">License &amp; 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/20211128174231/http://csrc.nist.gov/" class="usa-nav__link">Computer Security Resource Center (CSRC)</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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 &amp; 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/20211128174231/https://www.nist.gov/news-events/news" class="usa-nav__link">News </a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/news-events/events" class="usa-nav__link">Events</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/video-gallery" class="usa-nav__link">Video Gallery</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/image-gallery" class="usa-nav__link">Image Gallery</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/feature-stories" class="usa-nav__link">Feature Stories</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/blogs" class="usa-nav__link">Blogs</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/director/pao/media-contacts" class="usa-nav__link">Media Contacts</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/si-redefinition" class="usa-nav__link">SI Redefinition</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-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/20211128174231/https://www.nist.gov/about-nist" class="usa-nav__link">Learn About NIST</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/about-nist/visit" class="usa-nav__link">Visit</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/careers" class="usa-nav__link">Careers</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/about-nist/our-organization" class="usa-nav__link">Our Organization</a> <ul class="usa-nav__submenu-list"> <li> <a href="/web/20211128174231/https://www.nist.gov/about-nist/our-organization/mission-vision-values" class="usa-nav__link">Mission, Vision &amp; Values</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/director/nist-organization-structure" class="usa-nav__link">Organization Structure</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/director" class="usa-nav__link">Office of the Director</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/about-nist/our-organization/locations" class="usa-nav__link">Locations</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/about-nist/our-organization/people" class="usa-nav__link">People</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/about-nist/our-organization/budget-planning" class="usa-nav__link">Budget &amp; 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/20211128174231/https://www.nist.gov/industry-impacts" class="usa-nav__link">Industry Impacts</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/awards" class="usa-nav__link">Awards</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/history" class="usa-nav__link">History</a> <ul class="usa-nav__submenu-list"> <li> <a href="https://web.archive.org/web/20211128174231/http://nistdigitalarchives.contentdm.oclc.org/" class="usa-nav__link">NIST Digital Archives</a> </li> <li> <a href="/web/20211128174231/https://www.nist.gov/nist-museum" class="usa-nav__link">NIST Museum</a> </li> <li> <a href="/web/20211128174231/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/20211128174231/https://www.nist.gov/kids" class="usa-nav__link">Resources for Kids</a> </li> <li class="usa-nav__submenu-item"> <a href="/web/20211128174231/https://www.nist.gov/about-nist/policies-notices" class="usa-nav__link">Policies &amp; Notices</a> </li> </ul> </div> </div> </div> </li> </ul> </div> </nav> </header> <!-- nist-index-ignore-end --> <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> <div class="nist-section-header nist-section-header--topic nist-section-header--hero"> <div class="nist-section-header__hero-img"> <div class="nist-block nist-block--no-margin"> <div class="entity-reference"> <img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/images/2021/03/19/Infrastructure-_1200x248.jpg" width="1200" height="248" alt="overhead view of highways" loading="lazy" typeof="foaf:Image"/> </div> </div> </div> <div class="nist-section-header__main grid-container"> <div class="grid-row"> <div class="nist-section-header__title"> <h1 class="nist-page__title">Infrastructure</h1> </div> </div> </div> </div> </div> <div class="grid-container"> <div class="nist-page__region nist-page__region--topic-description padding-top-4 margin-top-1"> <div class="nist-region-heading"> <h2>Overview</h2> </div> <div class="grid-row"> <div class="tablet:grid-col-8 padding-right-5 margin-bottom-4"> <div class="text-with-summary"> <p><span><span><span><span><span>NIST supports the safety, interoperability, and resilience of the Nation’s core infrastructure, including <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/el/smart-grid">power</a>, <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/laboratories/projects-programs?k&amp;a%5B0%5D=249396&amp;tag">transportation</a>, <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/programs-projects/water-measurement-science">water</a>, and <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/advanced-communications">telecommunications</a>. </span></span></span></span></span></p> <p><span><span><span><span><span>NIST develops <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/news-events/news/2017/04/move-over-superman-nist-spectral-fingerprinting-sees-through-concrete-0">new measurement techniques</a> and disseminates <a href="https://web.archive.org/web/20211128174231/https://www-s.nist.gov/srmors/detail.cfm?searchstring=steel">reference materials</a> and <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/srd/buildings-and-construction">data</a> that support assessment of and innovation in performance and resilience of the built environment. NIST’s support for <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/building-codes-standards">code and standards</a> development helps ensure quality and safety in buildings and roads, and promotes interoperability in infrastructure systems. NIST also works with stakeholders throughout the infrastructure sector to help accelerate the deployment of new technologies, including assessments that can aid the prioritization of repairs or rebuilding.</span></span></span></span></span></p> </div> </div> <div class="tablet:grid-col-4"> <div class="nist-block nist-block--no-margin"> <h2 class="nist-block__title">Featured Content</h2> <div class="nist-field nist-field--label-hidden nist-field--link-list link font-sans-sm"> <div class="nist-field__items"> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/mml/physical-infrastructure">Physical Infrastructure Metrology</a></div> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/industry-impacts/physical-infrastructure-and-resilience">Industry Impacts: Physical Infrastructure and Resilience</a></div> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/community-resilience">Community Resilience program</a></div> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/el/smart-grid">Smart Grid program</a></div> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/programs-projects/public-safety-broadband-requirements-and-standards-project-description">Public Safety Broadband Requirements and Standards</a></div> </div> </div> </div> </div> </div> </div> </div> <div class="nist-page__region nist-page__region--main"> <div class="nist-block"> <div class="grid-container margin-y-5"> <div class="paragraph paragraph--type--topic-research paragraph--view-mode--default"> <div class="nist-region-heading"> <h2>The Research</h2> </div> <div class="grid-row"> <div class="tablet:grid-col-8 padding-right-5 margin-y-2"> <h2 class="nist-block__title">Projects &amp; Programs</h2> <article role="article" about="/programs-projects/polymer-composites" class="nist-teaser"> <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/web/20211128174231/https://www.nist.gov/programs-projects/polymer-composites" hreflang="en"><img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/thumbnail/public/images/mml/msed/polymers/fret-of-nano-cellulose-in-pe.gif?itok=umDdxnSD" width="99" height="100" loading="lazy" typeof="foaf:Image"/> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/web/20211128174231/https://www.nist.gov/programs-projects/polymer-composites"><span>Polymer Composites</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue boolean">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-long"> The objective of this project is the develop of tools to measure the fundamental structure-processing and structure -property relations associated with </div> </div> </div> </article> <article role="article" about="/programs-projects/continuing-support-cement-manufacturing" class="nist-teaser"> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/web/20211128174231/https://www.nist.gov/programs-projects/continuing-support-cement-manufacturing"><span>Continuing Support of Cement Manufacturing</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue boolean">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-long"> Cement manufacturers and their customers rely on the NIST Portland cement SRMs for laboratory qualification under ASTM International C 114-07 Standard Test </div> </div> </div> </article> <article role="article" about="/programs-projects/pipeline-safety" class="nist-teaser"> <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/web/20211128174231/https://www.nist.gov/programs-projects/pipeline-safety" hreflang="en"><img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/thumbnail/public/images/2017/02/13/running-crack-in-the-field.jpg?itok=acowmxYy" width="100" height="91" alt="Running crack in a buried pipeline." loading="lazy" typeof="foaf:Image"/> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/web/20211128174231/https://www.nist.gov/programs-projects/pipeline-safety"><span>Pipeline Safety</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue boolean">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-long"> Our goal is to provide standard test methods and critical data to the pipeline industry to improve safety and reliability. Of particular interest is the testing </div> </div> </div> </article> <div class="link-list"><a href="/web/20211128174231/https://www.nist.gov/laboratories/projects-programs/topic/2748236">View All Projects/Programs</a></div> </div> <div class="tablet:grid-col-4 margin-y-2"> <h2 class="nist-block__title">Additional Resources Links</h2> <div class="nist-field nist-field--label-hidden nist-field--link-list link nist-field--link-list font-sans-sm"> <div class="nist-field__items"> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/publications/search?k=&amp;d%5Bmin%5D=&amp;d%5Bmax%5D=&amp;t=&amp;a=&amp;s=All&amp;ta%5B0%5D=2748236&amp;ta%5B1%5D=2748236&amp;n=">Publications</a></div> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/buildings-construction">Buildings &amp; Construction</a></div> <div class="nist-field__item"><a href="/web/20211128174231/https://www.nist.gov/resilience">Resilience</a></div> </div> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--topic-featured paragraph--view-mode--default nist-content-row--width-full bg-base-lightest margin-y-5"> <div class="grid-container"> <div class="nist-card nist-card--horizontal nist-card--horizontal-full nist-card--base-lightest"> <div class="nist-card__inner"> <div class="nist-card__image"> <div class="entity-reference"> <figure class="nist-image"> <img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/800w_x_400h/public/images/2020/10/22/20ITL013_ScopeforPNTProfile_v2.png?itok=OJxMJ9Xv" width="800" height="400" alt="A city in daylight represents systems that the profile covers, such as our energy, transportation and finance infrastructure. Nearby, in darkness, a dish antenna broadcasting a signal to several satellites represents what lies beyond the scope of the profile, including ground or space based source signal generators and providers. " title="Positioning, Navigation and Timing draft profile scope" loading="lazy" typeof="foaf:Image"/> <figcaption class="nist-image__caption"> <div data-caption-editable="true" class="nist-image__caption-content"> </div> </figcaption> </figure> </div> </div> <div class="nist-card__title"> <h3> What is PNT? </h3> </div> <div class="nist-card__content"> <div class="text-long"><p><span><span><span><span><span><span><span><span>Do you know what PNT stands for? Billions of electronic devices, GPS navigation apps, and timing devices for stock trades and the power grid rely on positioning, navigation and timing services. Learn how PNT affects you in this explainer video.</span></span></span></span></span></span></span></span></p></div> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="/web/20211128174231/https://www.nist.gov/video/what-pnt" class="usa-button ">View video.</a> </div> </div> </div> </div> </div> </div> <div class="grid-container margin-y-4"> <div class="nist-region-heading"> <h2>News</h2> </div> <div class="margin-bottom-5"> <div class="entity-reference"> <div class="nist-card nist-card--horizontal nist-card--horizontal-full"> <div class="nist-card__inner"> <div class="nist-card__image"> <div class="entity-reference"> <img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/600w_x_360h/public/images/2020/08/07/usgs.png?itok=2lA9v2Wt" width="600" height="360" alt="a flooded downtown Cedar Rapids" loading="lazy" typeof="foaf:Image"/> </div> </div> <div class="nist-card__title"> <h3><span>Resilient Cedar Rapids: Rebuilding Better Pays Off</span> </h3> </div> <div class="nist-card__content"> <div class="text-with-summary">Many cities in the United States have experienced or will experience devastating losses caused by a natural disaster. In the aftermath of a disaster, the question communities grapple with is how to invest in recovery. Understandably, the focus tends to be on building back as quickly as possible. But it may actually make more economic sense to rebuild better than before. In June 2008, the</div> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="/web/20211128174231/https://www.nist.gov/blogs/taking-measure/resilient-cedar-rapids-rebuilding-better-pays" class="usa-button ">Read more</a> </div> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--dynamic-news-list-topic paragraph--view-mode--default"> <div class="views-element-container"><div class="js-view-dom-id-cc1288765d7f785e5a3c79c1f897002d320c3d2a7d27c272f822936c9108458b"> <div class="grid-row grid-gap-2"> <div class="nist-card tablet:grid-col-4 nist-card--topic "> <div class="nist-card__inner"> <div class="nist-card__image"> <div class="entity-reference"> <img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/800w_x_400h/public/images/2021/08/11/IMG_1426.jpg?itok=JgPJw5Ps" width="800" height="400" alt="Person in hard hat is tapping concrete with a hammerlike device." loading="lazy" typeof="foaf:Image"/> </div> </div> <div class="nist-card__title padding-y-5"> <h3><span property="schema:name">Aug. 11, 2021, Update on NIST’s Champlain Towers South Investigation</span> </h3> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="/web/20211128174231/https://www.nist.gov/news-events/news/2021/08/aug-11-2021-update-nists-champlain-towers-south-investigation" class="usa-button ">Read more</a> </div> </div> </div> </div> <div class="nist-card tablet:grid-col-4 nist-card--topic "> <div class="nist-card__inner"> <div class="nist-card__image"> <div class="entity-reference"> <img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/800w_x_400h/public/images/2020/03/31/mfg_logo_stack_compact_w.png?itok=AAb09aPp" width="800" height="400" alt="Manufacturing USA logo" loading="lazy" typeof="foaf:Image"/> </div> </div> <div class="nist-card__title padding-y-5"> <h3><span property="schema:name">NIST Launches New Manufacturing USA Technology Roadmap Grant Competition</span> </h3> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="/web/20211128174231/https://www.nist.gov/news-events/news/2021/06/nist-launches-new-manufacturing-usa-technology-roadmap-grant-competition" class="usa-button ">Read more</a> </div> </div> </div> </div> <div class="nist-card tablet:grid-col-4 nist-card--topic "> <div class="nist-card__inner"> <div class="nist-card__image"> <div class="entity-reference"> <img src="/web/20211128174231im_/https://www.nist.gov/sites/default/files/styles/800w_x_400h/public/images/2021/02/17/NIST_interoperability__960x600_v3.png?itok=CNXaed8h" width="800" height="400" alt="An infographic of benefits of power grid interoperability at the local, community, regional and global scales." loading="lazy" typeof="foaf:Image"/> </div> </div> <div class="nist-card__title padding-y-5"> <h3><span property="schema:name">New NIST Framework Strives for Cleaner, More Secure Power Grid</span> </h3> </div> <div class="nist-card__links"> <div class="nist-card__button"> <a href="/web/20211128174231/https://www.nist.gov/news-events/news/2021/02/new-nist-framework-strives-cleaner-more-secure-power-grid" class="usa-button ">Read more</a> </div> </div> </div> </div> </div> <footer> <div class="link-list"><a href="/web/20211128174231/https://www.nist.gov/news-events/news-updates/topic/2748236">View All News and Updates</a></div> </footer> </div> </div> </div> </div> <div class="margin-y-5 padding-5 bg-primary-dark"> <h2 class="text-white text-center">Stay in Touch</h2> <p class="text-white text-center">Sign up for our newsletter to stay up to date with the latest research, trends, and news for Infrastructure.</p> <form action="https://web.archive.org/web/20211128174231/https://public.govdelivery.com/accounts/USNIST/subscribers/qualify" accept-charset="UTF-8" method="post"> <input name="utf8" type="hidden" value="✓"/> <input type="hidden" name="topic_id" id="topic_id" value="USNIST_399"/> <div class="grid-row grid-gap-1 flex flex-justify-center"> <div class="tablet:grid-col-3"> <label class="usa-sr-only" for="email">Enter Email Address</label> <input class="usa-input" type="email" name="email" id="email" placeholder="Enter your email"> </div> <div class="grid-row flex-wrap margin-top-1"> <input type="submit" name="commit" value="Sign Up" class="usa-button usa-button--outline usa-button--inverse"> </div> </div> </form> </div> <div class="grid-container margin-y-4"> </div> </div> </div> </section> </div> <!-- 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/20211128174231/https://www.nist.gov/" title="National Institute of Standards and Technology" rel="home"> <img class="nist-footer__logo-img" src="/web/20211128174231im_/https://www.nist.gov/libraries/nist-component-library/dist/img/logo/nist_logo_sidestack_rev.svg" alt="National Institute of Standards and Technology logo"> </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/20211128174231/tel:301-975-2000">301-975-2000</a> </address> <p> <a href="https://web.archive.org/web/20211128174231/mailto:do-webmaster@nist.gov">Webmaster</a> | <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/about-nist/contact-us">Contact Us</a> | <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/about-nist/our-organization">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/20211128174231/https://twitter.com/NIST"> <span>Twitter</span> </a> <a class="nist-social nist-social--facebook-white" href="https://web.archive.org/web/20211128174231/https://www.facebook.com/NIST"> <span>Facebook</span> </a> <a class="nist-social nist-social--linkedin-white" href="https://web.archive.org/web/20211128174231/https://www.linkedin.com/company/nist"> <span>LinkedIn</span> </a> <a class="nist-social nist-social--instagram-white" href="https://web.archive.org/web/20211128174231/https://www.instagram.com/nist/"> <span>Instagram</span> </a> <a class="nist-social nist-social--youtube-white" href="https://web.archive.org/web/20211128174231/https://www.youtube.com/NIST"> <span>YouTube</span> </a> <a class="nist-social nist-social--rss-white" href="https://web.archive.org/web/20211128174231/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/20211128174231/https://service.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" href="/web/20211128174231/https://www.nist.gov/form/nist-gov-feedback?destination=/infrastructure" 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/20211128174231/https://www.nist.gov/privacy-policy">Site Privacy</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/oism/accessibility">Accessibility</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/privacy">Privacy Program</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/https://www.nist.gov/oism/copyrights">Copyrights</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/https://www.commerce.gov/vulnerability-disclosure-policy">Vulnerability Disclosure</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/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/20211128174231/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/20211128174231/https://www.nist.gov/environmental-policy-statement">Environmental Policy</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/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/20211128174231/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/20211128174231/https://www.commerce.gov/">Commerce.gov</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/http://www.science.gov/">Science.gov</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/http://www.usa.gov/">USA.gov</a> </li> <li class="nist-footer__menu-item"> <a href="https://web.archive.org/web/20211128174231/https://vote.gov/">Vote.gov</a> </li> </ul> </div> </div> </footer> <!-- nist-index-ignore-end --> </div> <script type="application/json" data-drupal-selector="drupal-settings-json">{"path":{"baseUrl":"\/","scriptPath":null,"pathPrefix":"","currentPath":"node\/1144781","currentPathIsAdmin":false,"isFront":false,"currentLanguage":"en"},"pluralDelimiter":"\u0003","suppressDeprecationErrors":true,"back_to_top":{"back_to_top_button_trigger":"100","back_to_top_prevent_on_mobile":0,"back_to_top_prevent_in_admin":1,"back_to_top_button_type":"image","back_to_top_button_text":"Back to top"},"google_analytics":{"trackOutbound":true,"trackMailto":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","trackDomainMode":1},"data":{"extlink":{"extTarget":false,"extTargetNoOverride":false,"extNofollow":false,"extNoreferrer":false,"extFollowNoOverride":false,"extClass":"ext","extLabel":"(link is external)","extImgClass":false,"extSubdomains":true,"extExclude":"\\.gov\\\/|doi\\.org\\\/|\\.mil\\\/","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":"mailto","mailtoLabel":"(link sends email)","extUseFontAwesome":false,"extIconPlacement":"append","extFaLinkClasses":"fa fa-external-link","extFaMailtoClasses":"fa fa-envelope-o","whitelistedDomains":[]}},"user":{"uid":0,"permissionsHash":"520687c07b4be4858e6c6ce3a624b46210584185ff52f288415ad535b343bd9c"}}</script> <script src="/web/20211128174231js_/https://www.nist.gov/sites/default/files/js/js_CN2pOLq87ukUMTEW5rMvv_YW-qVRF9ARlHljfAegbMY.js"></script> </body> </html> <!-- FILE ARCHIVED ON 17:42:31 Nov 28, 2021 AND RETRIEVED FROM THE INTERNET ARCHIVE ON 03:58:13 Feb 27, 2025. 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: 0.974 exclusion.robots: 0.032 exclusion.robots.policy: 0.023 esindex: 0.009 cdx.remote: 6.121 LoadShardBlock: 304.245 (3) PetaboxLoader3.datanode: 130.486 (4) PetaboxLoader3.resolve: 106.271 (2) load_resource: 116.703 -->

Pages: 1 2 3 4 5 6 7 8 9 10