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href="#1984–1986:_Educating_the_marketplace,_IBM_VAD,_hard_disk_drives,_PC_and_backup"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>1984–1986: Educating the marketplace, IBM VAD, hard disk drives, PC and backup</span> </div> </a> <ul id="toc-1984–1986:_Educating_the_marketplace,_IBM_VAD,_hard_disk_drives,_PC_and_backup-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>External links</span> </div> 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.infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><style data-mw-deduplicate="TemplateStyles:r1242257876">.mw-parser-output .ib-company .infobox-label{padding-right:0.5em}.mw-parser-output .ib-company .infobox-data,.mw-parser-output .ib-company .infobox-below{line-height:1.35em}.mw-parser-output .ib-company-logo img{background-color:#f8f9fa}.mw-parser-output .ib-company-locality,.mw-parser-output .ib-company-country{display:inline}</style><table class="infobox ib-company vcard"><caption class="infobox-title fn org" style="font-size: 125%;">Core International, Inc.</caption><tbody><tr><td colspan="2" class="infobox-image ib-company-logo logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Core_International_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/47/Core_International_logo.svg/220px-Core_International_logo.svg.png" decoding="async" width="220" height="66" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/47/Core_International_logo.svg/330px-Core_International_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/47/Core_International_logo.svg/440px-Core_International_logo.svg.png 2x" data-file-width="3649" data-file-height="1091" /></a></span></td></tr><tr><th scope="row" class="infobox-label">Company type</th><td class="infobox-data category"><a href="/wiki/Private_Company" class="mw-redirect" title="Private Company">Private</a></td></tr><tr><th scope="row" class="infobox-label">Industry</th><td class="infobox-data category"><a href="/wiki/Computer_hardware" title="Computer hardware">Computer hardware</a> and <a href="/wiki/Computer_software" class="mw-redirect" title="Computer software">Computer software</a></td></tr><tr><th scope="row" class="infobox-label">Founded</th><td class="infobox-data">1979 Incorporated 1981 in Florida, United States</td></tr><tr><th scope="row" class="infobox-label">Founder</th><td class="infobox-data agent"><a href="/wiki/Hal_Prewitt" title="Hal Prewitt">Hal Prewitt</a></td></tr><tr><th scope="row" class="infobox-label">Headquarters</th><td class="infobox-data label">Originally <a href="/wiki/Boca_Raton,_Florida" title="Boca Raton, Florida">Boca Raton, Florida</a></td></tr><tr><th scope="row" class="infobox-label"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Key people</div></th><td class="infobox-data agent"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li>After sale:</li><li>Dr. Susumu Yoshida</li><li>Hajime Unoki</li><li>Yoshio Ishigaki</li></ul></div></td></tr><tr><th scope="row" class="infobox-label">Products</th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><a href="/wiki/Computer_data_storage" title="Computer data storage">Computer data storage</a></li><li><a href="/wiki/Disk_array" title="Disk array">Disk array</a></li><li><a href="/wiki/Hard_disk_drives" class="mw-redirect" title="Hard disk drives">hard disk drives</a></li><li><a href="/wiki/Backup_software" title="Backup software">Backup software</a></li><li><a href="/wiki/Personal_computers" class="mw-redirect" title="Personal computers">Personal computers</a></li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap"><a href="/wiki/Asset" title="Asset">Total assets</a></span></th><td class="infobox-data">Unknown</td></tr><tr><th scope="row" class="infobox-label">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="http://www.sony.com">www<wbr />.sony<wbr />.com</a></span></td></tr></tbody></table> <p><b>Core International, Inc.</b>, commonly referred to as <b>Core</b>,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> was a multinational <a href="/wiki/Computer" title="Computer">computer</a> and <a href="/wiki/Technology" title="Technology">technology</a> corporation headquartered in <a href="/wiki/Boca_Raton,_Florida" title="Boca Raton, Florida">Boca Raton</a>, <a href="/wiki/Florida" title="Florida">Florida</a>, United States. </p><p>The company is now part of <a href="/wiki/Sony" title="Sony">Sony</a> and no longer exists as stand-alone identity. The company was founded in 1979<sup id="cite_ref-Whiz_kid_2-0" class="reference"><a href="#cite_note-Whiz_kid-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> by <a href="/wiki/Hal_Prewitt" title="Hal Prewitt">Hal Prewitt</a> as a technology firm to develop, market and support computer related products and services. They were best known for supporting <a href="/wiki/IBM" title="IBM">IBM's</a> first business <a href="/wiki/Microcomputer" title="Microcomputer">microcomputers</a> such as the <a href="/wiki/IBM_5100" title="IBM 5100">5100</a>, <a href="/wiki/IBM_5110" title="IBM 5110">5110</a> and <a href="/wiki/IBM_5120" title="IBM 5120">5120</a>. With the introduction of the <a href="/wiki/IBM_PC" class="mw-redirect" title="IBM PC">IBM PC</a> and <a href="/wiki/PC_AT" class="mw-redirect" title="PC AT">PC AT</a>, the company provided an extensive line of <a href="/wiki/Disk_drives" class="mw-redirect" title="Disk drives">disk drives</a>, <a href="/wiki/Backup" title="Backup">backup</a> and <a href="/wiki/Personal_computer" title="Personal computer">personal computer</a> products. Core became very well known as a leading industry developer of <a href="/wiki/Disk_array" title="Disk array">disk array</a> and <a href="/wiki/Computer_data_storage" title="Computer data storage">computer data storage</a>. </p><p>Many of Core's products<sup id="cite_ref-South_Florida_Business_Journal_3-0" class="reference"><a href="#cite_note-South_Florida_Business_Journal-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> were the first of their kind, had no direct competition and were widely regarded for their superior<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> performance and reliability. Users and the computer press raved about Core's products. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a> described Core's ATplus "is built like a Sherman tank, offering exceptional performance and reliability."<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <a href="/wiki/PC_Magazine" class="mw-redirect" title="PC Magazine">PC Magazine</a> called them "Workhorses of Performance Computing"<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> and "High-quality construction..breaks the speed barrier for access times"<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> and asked "Will other manufactures follow suit?" </p><p>Core was known for their advertising and perhaps produced a few of the <a href="/wiki/Personal_computing_industry" class="mw-redirect" title="Personal computing industry">PC Industry</a>'s greatest promotions. The 1985 and 1986 rebate and recall Ad<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> for <a href="/wiki/IBM" title="IBM">IBM</a> <a href="/wiki/PC_AT" class="mw-redirect" title="PC AT">PC AT</a> <a href="/wiki/Hard_disk_drives" class="mw-redirect" title="Hard disk drives">hard disk drives</a>. So successful<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> and controversial,<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> there was a rumor it was a topic at an <a href="/wiki/IBM" title="IBM">IBM</a> <a href="/wiki/Board_of_directors" title="Board of directors">board of directors</a> meeting. And the time where they gave away a free <a href="/wiki/IBM" title="IBM">IBM</a> <a href="/wiki/PC_AT" class="mw-redirect" title="PC AT">PC AT</a> when purchasing one of Core's ATplus 72 MB drives.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>Core remained a <a href="/wiki/Private_Company" class="mw-redirect" title="Private Company">private</a> company solely owned by <a href="/wiki/Hal_Prewitt" title="Hal Prewitt">Prewitt</a> until 1993<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> when purchased<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> by <a href="/wiki/Aiwa" title="Aiwa">Aiwa</a>, which was a wholly owned subsidiary of <a href="/wiki/Sony" title="Sony">Sony</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Core_International&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Hal_Prewitt" title="Hal Prewitt">Hal Prewitt</a></div><p>For business history pre-incorporation </p><div class="mw-heading mw-heading3"><h3 id="1975–1980:_Founding"><span id="1975.E2.80.931980:_Founding"></span>1975–1980: Founding</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Core_International&action=edit&section=2" title="Edit section: 1975–1980: Founding"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The company was built on the early work<sup id="cite_ref-South_Florida_Business_Journal_3-1" class="reference"><a href="#cite_note-South_Florida_Business_Journal-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> of <a href="/wiki/Hal_Prewitt" title="Hal Prewitt">Prewitt</a> using his business and <a href="/wiki/Personal_computer" title="Personal computer">personal computer</a> development experiences. This was the period during the creation of the first <a href="/wiki/Microcomputer" title="Microcomputer">microcomputers</a>, the launch of the <a href="/wiki/Altair_8800" title="Altair 8800">Altair 8800</a> and founding of <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. He was selling and programming <a href="/wiki/Minicomputers" class="mw-redirect" title="Minicomputers">Minicomputers</a> and assembling these <a href="/wiki/Microcomputer" title="Microcomputer">microcomputers</a>, attaching <a href="/wiki/Computer_peripheral" class="mw-redirect" title="Computer peripheral">computer peripherals</a>, <a href="/wiki/Computer_programming" title="Computer programming">programming</a> and building them into business <a href="/wiki/Computer_systems" class="mw-redirect" title="Computer systems">computer systems</a>. </p><p>Core was created under a different <a href="/wiki/Business_model" title="Business model">business model</a>.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Initially, it was marketed as an <a href="/wiki/Voluntary_association" title="Voluntary association">association</a> and structured as a <a href="/wiki/For-Profit_Organization" class="mw-redirect" title="For-Profit Organization">for-profit organization</a> specifically for users of the <a href="/wiki/IBM_5110" title="IBM 5110">IBM 5100 Series</a> and <a href="/wiki/IBM_System/23" class="mw-redirect" title="IBM System/23">IBM System/23</a>. The objective was to sell by <a href="/wiki/Mail-order" class="mw-redirect" title="Mail-order">mail-order</a> computer supplies, <a href="/wiki/Custom_software_development" class="mw-redirect" title="Custom software development">pre-developed</a> (<a href="/wiki/Commercial_off-the-shelf" title="Commercial off-the-shelf">off-the-shelf</a>) programs and hardware maintenance service. Supplies included <a href="/wiki/Dot_matrix_printer" class="mw-redirect" title="Dot matrix printer">printer ribbons</a> and <a href="/wiki/Continuous_stationery" title="Continuous stationery">paper</a>, <a href="/wiki/Floppy_disk" title="Floppy disk">diskettes</a>, <a href="/wiki/Magnetic_tape_data_storage" class="mw-redirect" title="Magnetic tape data storage">tape cartridges</a>. Software ranged from simple mortgage interest calculations, word processing, games and utilities to advanced payroll, accounting and industry specific applications. Users wanted readily available, simple to install and support for software that was also low in cost. Core was able to fill this niche because <a href="/wiki/IBM" title="IBM">IBM</a> had developed the machines with engineering and scientific applications in mind, while business programs such as construction, agriculture, and manufacturing were not generally available. Computer maintenance was an insurance program that provided on-site repairs and replacement parts, all provided by <a href="/wiki/IBM" title="IBM">IBM service</a> but at a lower cost than available directly from <a href="/wiki/IBM" title="IBM">IBM</a>. </p><p>The company was very successful<sup id="cite_ref-Whiz_kid_2-1" class="reference"><a href="#cite_note-Whiz_kid-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> attracting users of the <a href="/wiki/IBM_5110" title="IBM 5110">IBM 5100 Series</a> as many <a href="/wiki/IBM" title="IBM">IBM</a> Sales Representatives referred their customers to the organization. While Core grew, profits were used for the continuing development of <a href="/wiki/Computer_data_storage" title="Computer data storage">computer data storage</a>. </p> <div class="mw-heading mw-heading3"><h3 id="1981–1983:_Hard_disk_drives,_LAN_and_PC_for_IBM_5100_series"><span id="1981.E2.80.931983:_Hard_disk_drives.2C_LAN_and_PC_for_IBM_5100_series"></span>1981–1983: Hard disk drives, LAN and PC for IBM 5100 series</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Core_International&action=edit&section=3" title="Edit section: 1981–1983: Hard disk drives, LAN and PC for IBM 5100 series"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>These <a href="/wiki/IBM" title="IBM">IBM</a> machines had a <a href="/wiki/Closed_architecture" class="mw-redirect" title="Closed architecture">closed architecture</a>, with most of the design information unpublished and held secret.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> Computer systems of this design are extremely or most likely impossible to have the ability to swap components, obtain support from other vendors or upgrade to better configuration/another model unless that option is available from the original manufacturer. The <a href="/wiki/Vendor_lock-in" title="Vendor lock-in">limitations</a> make a customer dependent on one vendor for products and services for the software and hardware parts of the system. </p><p>Core sensed an opportunity to provide greater and faster <a href="/wiki/Computer_data_storage" title="Computer data storage">computer data storage</a>. After a five-year effort, in September 1982 they announced the availability of the first <a href="/wiki/Hard_disk_drives" class="mw-redirect" title="Hard disk drives">hard disk drives</a><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> and <a href="/wiki/Local_area_network" title="Local area network">local area network (LAN)</a><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> for the <a href="/wiki/IBM_5110" title="IBM 5110">IBM 5100 Series</a>. IBM systems as sold were storage limited and without a network option; the <a href="/wiki/IBM_5100" title="IBM 5100">5100</a> had tape with the <a href="/wiki/IBM_5110" title="IBM 5110">5110</a> and <a href="/wiki/IBM_5120" title="IBM 5120">5120</a> restricted to 1.2 MB floppy disks. Core drives were available starting at 10 MB and increased up to 160 MB in removable and fixed configurations. </p><p>CoreNet, the <a href="/wiki/Local_area_network" title="Local area network">LAN</a> built into each Core <a href="/wiki/Computer_data_storage" title="Computer data storage">storage system</a>, allowed interconnection of up to eight IBM 5100 Series systems, providing the ability to share storage and data. This configuration pre-dated LANs of the period for the <a href="/wiki/IBM_PC" class="mw-redirect" title="IBM PC">IBM PC</a> and <a href="/wiki/IBM_PC_compatible" title="IBM PC compatible">compatibles</a>. </p><p>In 1983, Core introduced two major solutions as IBM was withdrawing from marketing the IBM 5100 series. First, software called PC51 that would run allowed 5100 series computer programs written in BASIC to run unmodified on the IBM PC and compatibles under <a href="/wiki/MS-DOS" title="MS-DOS">MS-DOS</a>. And second, a LAN card for the IBM PC and compatibles that provided connection to the IBM 5100 Series network. These solutions allowed IBM 5110/5120 series users to add new technology and increase productivity while retaining their investment in equipment and software. </p><p>Core's development of their <a href="/wiki/Computer_data_storage" title="Computer data storage">storage systems</a>, LAN and PC51 software was major <a href="/wiki/Technology" title="Technology">technology</a> <a href="/wiki/Engineering" title="Engineering">engineering</a> feat without rivals. Due to the complexity and the successful <a href="/wiki/Reverse_engineering" title="Reverse engineering">reverse engineering</a> of the systems, resulted in <a href="/wiki/Captive_market" title="Captive market">captive market</a> as they were the only organization able to provide an upgrade path for these IBM owners. </p> <div class="mw-heading mw-heading3"><h3 id="1984–1986:_Educating_the_marketplace,_IBM_VAD,_hard_disk_drives,_PC_and_backup"><span id="1984.E2.80.931986:_Educating_the_marketplace.2C_IBM_VAD.2C_hard_disk_drives.2C_PC_and_backup"></span>1984–1986: Educating the marketplace, IBM VAD, hard disk drives, PC and backup</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Core_International&action=edit&section=4" title="Edit section: 1984–1986: Educating the marketplace, IBM VAD, hard disk drives, PC and backup"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1984, CORE expanded its product focus and entered the <a href="/wiki/Personal_computer" title="Personal computer">personal computer</a> (PC) marketplace. The company's first product introduced the year before, called PC-51, was a completely new operating system (and language) for the <a href="/wiki/IBM_PC" class="mw-redirect" title="IBM PC">IBM PC</a> and <a href="/wiki/IBM_PC_compatible" title="IBM PC compatible">compatibles</a>. It enabled a PC to function like an IBM 5110/5120 system, demonstrating the company's strong software development capabilities. Not only did this allow users to continue using the application software they had already developed, but it increased processing speed by a factor of two to ten times, and reduced maintenance cost up to 90%. </p><p>This new product opened up an unexplored marketplace for CORE by allowing the company to become an IBM value-added dealer <a href="/wiki/Value-added_reseller" title="Value-added reseller">(VAD)</a> and sell both the IBM PC and CORE products individually and as a combined package. IBM authorized and promoted this relationship because it provided an upgrade path for their customers that was previously unavailable. As a result of the early development effort for the IBM 5100 series, CORE released its own family of high-performance hard disk drives called the ATplus Series,<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> with better capacity, reliability and performance than IBM's drives. </p><p>A few weeks after the introduction of the new <a href="/wiki/IBM_AT" class="mw-redirect" title="IBM AT">IBM AT</a> in August 1984, CORE discovered problems in the factory-issued hard disk drive. As the media and marketplace learned of IBM's disk problems, CORE was once again in a unique position to capitalize on an opportunity, without any significant competition. For more than six months the IBM AT the model with the <a href="/wiki/Computer_Memories_Inc." class="mw-redirect" title="Computer Memories Inc.">CMI</a> was in short supply.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> Delays were attributed to lack of drives, technical problems with the machine or some other undisclosed issues. </p><p>Core desired a major partner and selected <a href="/wiki/Control_Data_Corporation" title="Control Data Corporation">Control Data Corporation (CDC)</a> to assist with the introduction of the drives for the PC marketplace. The announcement<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> was made in February 1985 and generated a significant amount of press coverage. </p><p>Core discovered that a general lack of understanding existed among the <a href="/wiki/News_media" title="News media">news media</a> and users regarding technology of different computer and mass storage systems. Few understood the value of different systems to the end-user or how to rate the many choices in the marketplace. In response, Core began placing considerable emphasis on user education, which resulted in a major contribution to computer industry. Directly from these efforts, the news media, <a href="/wiki/Computer_magazines" class="mw-redirect" title="Computer magazines">computer magazines</a>, product reviewers, dealers and computer manufactures started discussing, providing and promoting "<a href="/wiki/Seek_time" class="mw-redirect" title="Seek time">seek time</a>", "<a href="/wiki/Disk_access_time" class="mw-redirect" title="Disk access time">access time</a>", "<a href="/wiki/Data_transfer_rate_(disk_drive)" class="mw-redirect" title="Data transfer rate (disk drive)">transfer time</a>" and how to value or understand <a href="/wiki/Hard_disk_drives" class="mw-redirect" title="Hard disk drives">hard disk drives</a> importance in a <a href="/wiki/Computer_system" class="mw-redirect" title="Computer system">computer system</a>. The company believed the more end-users learned about computers and the engineering behind Core products, the less these users wanted any other product. </p><p>Purchasers of the IBM AT were reporting some dealers<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> were installing inferior drives into the computer without disclosing the fact. To help buyers and for industry education, Core developed the DiskP program, later replaced by the COREtest<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> (DOS based), to identify sub-standard products by providing a visual demonstration of the speed and comparative measurements of hard disk drives and controllers. Many computer publications,<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> hardware manufacturers, distributors, dealers<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> and independent evaluation firms<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> relied on COREtest for product comparison, which made COREtest the industry standard<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> and most often quoted benchmark. As these programs were provide without charge and freely available from <a href="/wiki/Bulletin_board_system" title="Bulletin board system">BBS</a>, computer magazines and dealers, it is believed there was an installed base of over million copies worldwide promoting Core technology and education. </p><p>For more than two years, newspapers,<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> magazines and computer publications<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> ran stories on the IBM AT and <a href="/wiki/Computer_Memories_Inc." class="mw-redirect" title="Computer Memories Inc.">Computer Memories Inc.</a> (CMI) hard disk drives problems. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Core_International&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.trademarkia.com/core-73587709.html">"CORE"</a>. Registered Trademark<span class="reference-accessdate">. Retrieved <span class="nowrap">January 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=CORE&rft.pub=Registered+Trademark&rft_id=http%3A%2F%2Fwww.trademarkia.com%2Fcore-73587709.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-Whiz_kid-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Whiz_kid_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Whiz_kid_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20131106075453/http://www.highbeam.com/doc/1G1-6378228.html">"Hal Prewitt; a computer whiz kid challenges the big boys"</a>. <a href="/wiki/Florida_Trend" title="Florida Trend">Florida Trend</a>. August 1, 1987. Archived from <a rel="nofollow" class="external text" href="http://www.highbeam.com/doc/1G1-6378228.html">the original</a> on November 6, 2013<span class="reference-accessdate">. Retrieved <span class="nowrap">October 30,</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Hal+Prewitt%3B+a+computer+whiz+kid+challenges+the+big+boys&rft.date=1987-08-01&rft_id=http%3A%2F%2Fwww.highbeam.com%2Fdoc%2F1G1-6378228.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-South_Florida_Business_Journal-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-South_Florida_Business_Journal_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-South_Florida_Business_Journal_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://coreinternational.info/SFBJ_June_88.pdf">"Boyhood dream becomes a reality for entrepreneur"</a> <span class="cs1-format">(PDF)</span>. <a href="/wiki/South_Florida_Business_Journal" class="mw-redirect" title="South Florida Business Journal">South Florida Business Journal</a><span class="reference-accessdate">. Retrieved <span class="nowrap">January 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Boyhood+dream+becomes+a+reality+for+entrepreneur&rft.pub=South+Florida+Business+Journal&rft_id=http%3A%2F%2Fcoreinternational.info%2FSFBJ_June_88.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=hTwEAAAAMBAJ&q=%22core+International%22+sherman+tank&pg=PA55"><i>Hard Disk Drive Survives Sherman Tank Test</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. November 24, 1986<span class="reference-accessdate">. Retrieved <span class="nowrap">January 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Hard+Disk+Drive+Survives+Sherman+Tank+Test&rft.pub=InfoWorld&rft.date=1986-11-24&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DhTwEAAAAMBAJ%26q%3D%2522core%2BInternational%2522%2Bsherman%2Btank%26pg%3DPA55&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=AS8EAAAAMBAJ&q=%22is+built+like+a+Sherman+tank%2C+offering+exceptional+performance+and+reliability.%22&pg=PA44"><i>Reliability is Hard Disk Key</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. 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Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Reliability+is+Hard+Disk+Key&rft.pub=InfoWorld&rft.date=1985-07-22&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DAS8EAAAAMBAJ%26q%3D%2522is%2Bbuilt%2Blike%2Ba%2BSherman%2Btank%252C%2Boffering%2Bexceptional%2Bperformance%2Band%2Breliability.%2522%26pg%3DPA44&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://coreinternational.info/1985_PCMag_on_ATplus_Drives.pdf">"Core Hard Disk - August 6, 1985"</a> <span class="cs1-format">(PDF)</span>. <a href="/wiki/PC_Magazine" class="mw-redirect" title="PC Magazine">PC Magazine</a><span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Core+Hard+Disk+-+August+6%2C+1985&rft.pub=PC+Magazine&rft_id=http%3A%2F%2Fcoreinternational.info%2F1985_PCMag_on_ATplus_Drives.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20210517150554/http://www.coreinternational.info/1986_PCMag_on_HC_Drives.pdf">"One, Two, Breakthrough: The Core HC25"</a> <span class="cs1-format">(PDF)</span>. <a href="/wiki/PC_Magazine" class="mw-redirect" title="PC Magazine">PC Magazine</a> - May 1986. Archived from <a rel="nofollow" class="external text" href="http://www.coreinternational.info/1986_PCMag_on_HC_Drives.pdf">the original</a> <span class="cs1-format">(PDF)</span> on May 17, 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=One%2C+Two%2C+Breakthrough%3A+The+Core+HC25&rft.pub=PC+Magazine+-+May+1986&rft_id=http%3A%2F%2Fwww.coreinternational.info%2F1986_PCMag_on_HC_Drives.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=MS8EAAAAMBAJ&q=mercedes+infoworld&pg=PA4"><i>Mercedes Ad - Circa 1985</i></a>. Core. November 4, 1985<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Mercedes+Ad+-+Circa+1985&rft.pub=Core&rft.date=1985-11-04&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DMS8EAAAAMBAJ%26q%3Dmercedes%2Binfoworld%26pg%3DPA4&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=cC8EAAAAMBAJ&q=IBM+at+%22Core+International%22+%241%2C000+rebate&pg=PA54"><i>Ad of the Year - John C. Dvorak</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. December 16, 1985<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Ad+of+the+Year+-+John+C.+Dvorak&rft.pub=InfoWorld&rft.date=1985-12-16&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DcC8EAAAAMBAJ%26q%3DIBM%2Bat%2B%2522Core%2BInternational%2522%2B%25241%252C000%2Brebate%26pg%3DPA54&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.orlandosentinel.com/1985/12/15/company-to-send-ibm-on-sea-dive/">"Company To Send Ibm On Sea Dive"</a>. <a href="/wiki/Sun-Sentinel" class="mw-redirect" title="Sun-Sentinel">Sun-Sentinel</a><span class="reference-accessdate">. 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Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=FREE+IBM+PC+AT+Ad+-+Circa+1985&rft.pub=Core&rft.date=1985-08-19&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D_S4EAAAAMBAJ%26q%3D%2522free%2BIBM%2522%2Bpc%2Bat%2Binfoworld%26pg%3DPA14&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110725001331/http://articles.sun-sentinel.com/1992-04-14/business/9202020890_1_aiwa-prewitt-core">"Japanese Firm Invests Heavily In Boca's Core"</a>. <a href="/wiki/Sun-Sentinel" class="mw-redirect" title="Sun-Sentinel">Sun-Sentinel</a>. Archived from <a rel="nofollow" class="external text" href="http://articles.sun-sentinel.com/1992-04-14/business/9202020890_1_aiwa-prewitt-core">the original</a> on July 25, 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">January 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Japanese+Firm+Invests+Heavily+In+Boca%27s+Core&rft.pub=Sun-Sentinel&rft_id=http%3A%2F%2Farticles.sun-sentinel.com%2F1992-04-14%2Fbusiness%2F9202020890_1_aiwa-prewitt-core&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.alacrastore.com/storecontent/Thomson_M&A/Aiwa_Co_Ltd_Sony_Corp_acquires_Core_International-252303020">"Aiwa Co Ltd(Sony Corp) acquires Core International"</a>. <a href="/wiki/Thomson_Financial_Mergers_%26_Acquisitions" class="mw-redirect" title="Thomson Financial Mergers & Acquisitions">Thomson Financial Mergers & Acquisitions</a><span class="reference-accessdate">. Retrieved <span class="nowrap">January 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Aiwa+Co+Ltd%28Sony+Corp%29+acquires+Core+International&rft.pub=Thomson+Financial+Mergers+%26+Acquisitions&rft_id=http%3A%2F%2Fwww.alacrastore.com%2Fstorecontent%2FThomson_M%26A%2FAiwa_Co_Ltd_Sony_Corp_acquires_Core_International-252303020&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://coreinternational.info/198007_Join_Core_Letter.pdf">"Join Core circa 1980"</a> <span class="cs1-format">(PDF)</span>. Core<span class="reference-accessdate">. Retrieved <span class="nowrap">March 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Join+Core+circa+1980&rft.pub=Core&rft_id=http%3A%2F%2Fcoreinternational.info%2F198007_Join_Core_Letter.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.pcmag.com/encyclopedia/term/39841/closed-architecture">"Definition of closed architecture"</a>. PC Magazine<span class="reference-accessdate">. Retrieved <span class="nowrap">October 30,</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Definition+of+closed+architecture&rft.pub=PC+Magazine&rft_id=https%3A%2F%2Fwww.pcmag.com%2Fencyclopedia%2Fterm%2F39841%2Fclosed-architecture&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.coreinternational.info/1981_5110_Disk_Brochure.pdf">"Save IBM 5110/20's from junk yards of the world"</a> <span class="cs1-format">(PDF)</span>. Core<span class="reference-accessdate">. Retrieved <span class="nowrap">March 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Save+IBM+5110%2F20%27s+from+junk+yards+of+the+world&rft.pub=Core&rft_id=http%3A%2F%2Fwww.coreinternational.info%2F1981_5110_Disk_Brochure.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.coreinternational.info/1982_Sept_CORE_Newsletter.pdf">"September 1982 Core Newsletter"</a> <span class="cs1-format">(PDF)</span>. Core<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=September+1982+Core+Newsletter&rft.pub=Core&rft_id=http%3A%2F%2Fwww.coreinternational.info%2F1982_Sept_CORE_Newsletter.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.coreinternational.info/1984_ATplus_Brochure.pdf">"ATplus"</a> <span class="cs1-format">(PDF)</span>. Core<span class="reference-accessdate">. Retrieved <span class="nowrap">March 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=ATplus&rft.pub=Core&rft_id=http%3A%2F%2Fwww.coreinternational.info%2F1984_ATplus_Brochure.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=6i4EAAAAMBAJ&q=shortage+IBM+pc+at+infoworld&pg=PA33"><i>Waiting for the AT Train</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. January 28, 1985<span class="reference-accessdate">. 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Retrieved <span class="nowrap">March 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Core%2C+Control+Data+Offer+AT+Disk-Upgrade+Kits&rft.pub=Core&rft_id=http%3A%2F%2Fwww.coreinternational.info%2F1985_PCW_on_ATplus_Anouncm.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.coreinternational.info/1985_MM_on_ATplus_Announcment.pdf">"IBM VAD Sells own drives"</a> <span class="cs1-format">(PDF)</span>. Core<span class="reference-accessdate">. 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Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Dealers+Pawn+Off+Inferior+Drives&rft.pub=InfoWorld&rft.date=1986-03-10&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dqy8EAAAAMBAJ%26q%3Dmarch%252010%252C%25201986%2520infoworld%26pg%3DPA1&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-23">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=Oi8EAAAAMBAJ&q=infoworld+march+10,+1986++%22dealers+pawn%22&pg=PA5"><i>Substandard Components Still Surfacing</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. March 31, 1986<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Substandard+Components+Still+Surfacing&rft.pub=InfoWorld&rft.date=1986-03-31&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DOi8EAAAAMBAJ%26q%3Dinfoworld%2Bmarch%2B10%2C%2B1986%2B%2B%2522dealers%2Bpawn%2522%26pg%3DPA5&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-24">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://sta.c64.org/dosprg.html">"Useful DOS Software"</a>. Joe Forster<span class="reference-accessdate">. Retrieved <span class="nowrap">January 31,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Useful+DOS+Software&rft.pub=Joe+Forster&rft_id=http%3A%2F%2Fsta.c64.org%2Fdosprg.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-25">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=Ty8EAAAAMBAJ&q=Coretest&pg=PA43"><i>Equity II Competes as a low-priced clone</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. June 9, 1986<span class="reference-accessdate">. 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Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Los+Angeles+Times&rft.atitle=Disk-Drive+Maker+Put+Its+Eggs+in+One+Basket--and+Fell&rft.date=1987-03-17&rft.aulast=Bates&rft.aufirst=James&rft_id=https%3A%2F%2Fwww.latimes.com%2Farchives%2Fla-xpm-1987-03-17-fi-12289-story.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-31"><span class="mw-cite-backlink"><b><a href="#cite_ref-31">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=qS4EAAAAMBAJ&q=%22stay+away+from+this+speed+demon%22&pg=PA57"><i>IBM PC AT</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. December 3, 1984<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=IBM+PC+AT&rft.pub=InfoWorld&rft.date=1984-12-03&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DqS4EAAAAMBAJ%26q%3D%2522stay%2Baway%2Bfrom%2Bthis%2Bspeed%2Bdemon%2522%26pg%3DPA57&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-32"><span class="mw-cite-backlink"><b><a href="#cite_ref-32">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=5C4EAAAAMBAJ&q=march%2011%201985%20PC%20AT%20infoworld%20cause%20concerns&pg=PA24"><i>PC AT Problems Cause Concerns</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. March 11, 1985<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=PC+AT+Problems+Cause+Concerns&rft.pub=InfoWorld&rft.date=1985-03-11&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D5C4EAAAAMBAJ%26q%3Dmarch%252011%25201985%2520PC%2520AT%2520infoworld%2520cause%2520concerns%26pg%3DPA24&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> <li id="cite_note-33"><span class="mw-cite-backlink"><b><a href="#cite_ref-33">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=OC8EAAAAMBAJ&q=IBM%20at%20drive%20problems%201985&pg=PA6"><i>Drive Problems Continue in PC AT</i></a>. <a href="/wiki/InfoWorld" title="InfoWorld">InfoWorld</a>. November 18, 1985<span class="reference-accessdate">. Retrieved <span class="nowrap">April 14,</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Drive+Problems+Continue+in+PC+AT&rft.pub=InfoWorld&rft.date=1985-11-18&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DOC8EAAAAMBAJ%26q%3DIBM%2520at%2520drive%2520problems%25201985%26pg%3DPA6&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACore+International" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Core_International&action=edit&section=6" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1266661725">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .portalbox-entry{display:table-row;font-size:85%;line-height:110%;height:1.9em;font-style:italic;font-weight:bold}.mw-parser-output .portalbox-image{display:table-cell;padding:0.2em;vertical-align:middle;text-align:center}.mw-parser-output .portalbox-link{display:table-cell;padding:0.2em 0.2em 0.2em 0.3em;vertical-align:middle}@media(min-width:720px){.mw-parser-output .portalleft{margin:0.5em 1em 0.5em 0}.mw-parser-output .portalright{clear:right;float:right;margin:0.5em 0 0.5em 1em}}</style><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Industry5.svg/28px-Industry5.svg.png" decoding="async" width="28" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Industry5.svg/42px-Industry5.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Industry5.svg/56px-Industry5.svg.png 2x" data-file-width="512" data-file-height="512" /></span></span></span><span class="portalbox-link"><a href="/wiki/Portal:Companies" title="Portal:Companies">Companies portal</a></span></li></ul> <ul><li><a rel="nofollow" class="external text" href="http://www.sony.com/">Sony official website</a></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; 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