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AT&T UNIX PC
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<h2 id="hardware-configuration">Hardware configuration</h2> <ul><li>10 MHz <a href="/facts/Motorola_68010/tSoQFndh">Motorola 68010</a> (16-bit external bus, 32-bit internal) with custom, discrete <a href="/facts/Memory_management_unit/tJQtAQzI">MMU</a><a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a></li> <li>Internal <a href="/facts/Modified_Frequency_Modulation/XLIItN1f">MFM</a> <a href="/facts/Hard_drive/kekLSGSE">hard drive</a>, originally 10 MB,<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> later models with up to 67 MB<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a></li> <li>Internal 5-1/4" floppy drive<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a></li> <li>At least 512 KB RAM on main board (1 MB or 2 MB were also options), expandable up to an additional 2 MB via expansion cards (4 MB max total)<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></li> <li>32 KB VRAM</li> <li>16 KB ROM (up to 32 KB ROM supported using 2x 27128 EPROMs)</li> <li>2 KB SRAM (for <a href="/facts/Memory_management_unit/tJQtAQzI">MMU</a> <a href="/facts/Page_table/0IBU5cwg">page table</a>)</li> <li>Monochrome green phosphor 12-inch (300 mm) monitor<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a></li> <li>Internal 300/1200 bit/s <a href="/facts/Modem/9H0Xwtq0">modem</a><a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a></li> <li><a href="/facts/RS-232/NCpvGuyq">RS-232</a> <a href="/facts/Serial_port/VpcrH530">serial port</a><a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a></li> <li>Centronics <a href="/facts/Parallel_port/qpkjH8ts">parallel port</a><a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a></li> <li>3 S4BUS expansion slots<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a></li> <li>3 phone jacks<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a></li></ul> <h3>PC 7300</h3> <p>The initial PC 7300 model offered a modest 512 KB<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> of memory and a small, low performance 10 MB hard drive.<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a> This model, although progressive in offering a Unix system for desktop office operation, was underpowered and produced considerable fan and drive bearing noise even when idling. The modern-looking "wedge" design by <a href="/facts/Mike_Nuttall/9694oQpJ">Mike Nuttall</a> was innovative, and the machine gained notoriety appearing in numerous movies and TV shows as the token "computer".<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a> </p> <h3>AT&T 3B/1</h3> <p>An enhanced model, "3B/1", was introduced in October 1985 starting at US$8,495 (equivalent to $24,800 in 2024).<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a><a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a> The cover was redesigned to accommodate a <a href="/facts/Full-height/kb4WHh3g">full-height</a> 67 MB hard drive.<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a> This cover change added a 'hump' to the case, expanded onboard memory to 1 or 2 MB, as well as added a better power supply.<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a> </p> <h3>S/50</h3> <p>Convergent Technologies offered an S/50 which was a re-badged PC 7300.<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a> </p> <h3>Olivetti AT&T 3B1</h3> <p><a href="/facts/Olivetti_S.p.A./bdoq8XPH">Olivetti</a> released the "Olivetti AT&T 3B1 Computer" in Europe.<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a> </p> <h2 id="operating-system">Operating system</h2> <p>The operating system is based on <a href="/facts/Unix_System_V/Epm6GEY4">Unix System V</a> Release 2,<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a> with extensions from 4.1 and 4.2 <a href="/facts/Berkeley_Software_Distribution/XQKcURrh">BSD</a>, System V Release 3 and Convergent Technologies.<a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a> The last release was 3.51.<a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a> </p><p>Windowing software (xt/layers) from SVR3 was provided to allow connection to a <a href="/facts/Blit_(computer_terminal)/zWf3htCY">DMD 5620</a> graphics terminal. </p> <h2 id="programming-languages">Programming languages</h2> <ul><li>AT&T BASIC<a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a></li> <li><a href="/facts/DBase/9U0YCWEo">dBase</a> III<a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a></li> <li><a href="/facts/GNU_Compiler_Collection/t07jh01k">GNU C++</a></li> <li><a href="/facts/LISP/xJHA3CrX">LISP</a></li> <li>LPI <a href="/facts/C_(programming_language)/Ky2No763">C</a><a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a><a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a></li> <li>LPI <a href="/facts/COBOL/wVnhqs0k">COBOL</a><a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a></li> <li>LPI DEBUG (debugger)</li> <li>LPI Fortran<a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a><a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a></li> <li>LPI <a href="/facts/Pascal_(programming_language)/b3yvp8bF">Pascal</a><a class="footnote-ref" id="fnref:36" href="#fn:36"><sup>36</sup></a><a class="footnote-ref" id="fnref:37" href="#fn:37"><sup>37</sup></a></li> <li>LPI <a href="/facts/PL%2fI/469mVYgd">PL/I</a><a class="footnote-ref" id="fnref:38" href="#fn:38"><sup>38</sup></a></li> <li><a href="/facts/Microsoft_BASIC/SuctFIyc">Microsoft BASIC</a><a class="footnote-ref" id="fnref:39" href="#fn:39"><sup>39</sup></a><a class="footnote-ref" id="fnref:40" href="#fn:40"><sup>40</sup></a></li> <li><a href="/facts/Ryan%25E2%2588%2592McFarland/YD76rz1g">RM</a>/<a href="/facts/COBOL/wVnhqs0k">COBOL</a><a class="footnote-ref" id="fnref:41" href="#fn:41"><sup>41</sup></a></li> <li>RM/<a href="/facts/Fortran/m1KqjcMU">Fortran</a><a class="footnote-ref" id="fnref:42" href="#fn:42"><sup>42</sup></a></li> <li>SMC <a href="/facts/BASIC/VYMl5TmA">BASIC</a><a class="footnote-ref" id="fnref:43" href="#fn:43"><sup>43</sup></a></li> <li>SVS Fortran<a class="footnote-ref" id="fnref:44" href="#fn:44"><sup>44</sup></a></li> <li>SVS Pascal<a class="footnote-ref" id="fnref:45" href="#fn:45"><sup>45</sup></a></li></ul> <h2 id="application-software">Application software</h2> <ul><li>Business Graphics (produces chart graphics from 20/20 spreadsheet data)</li> <li><a href="/facts/DBase/9U0YCWEo">dBASE</a> III (DBM)<a class="footnote-ref" id="fnref:46" href="#fn:46"><sup>46</sup></a></li> <li><a href="/facts/Informix/jDdeW93c">Informix</a> (DBM)</li> <li><a href="/facts/Oracle_database/FHv5g732">Oracle</a> (DBM)</li> <li>Paint Power (drawing package)</li> <li><a href="/facts/Samna/6jVwa1GX">Samna</a>/AT&T Write Power 2 (word processor/spreadsheet)</li> <li>Samna Plus (word processor/spreadsheet)<a class="footnote-ref" id="fnref:47" href="#fn:47"><sup>47</sup></a></li> <li>SMART System (Office Suite)</li> <li>Sound Presentations (presentation graphics)<a class="footnote-ref" id="fnref:48" href="#fn:48"><sup>48</sup></a></li></ul> <h3>Spreadsheet software</h3> <ul><li><a href="/facts/20%2f20_(spreadsheet_software)/foBsxTlz">20/20 (Supercomp 20)</a><a class="footnote-ref" id="fnref:49" href="#fn:49"><sup>49</sup></a></li> <li><a href="/facts/Multiplan/zs72w59x">Microsoft Multiplan</a><a class="footnote-ref" id="fnref:50" href="#fn:50"><sup>50</sup></a><a class="footnote-ref" id="fnref:51" href="#fn:51"><sup>51</sup></a></li></ul> <h3>Word processors</h3> <ul><li>AT&T Word Processor<a class="footnote-ref" id="fnref:52" href="#fn:52"><sup>52</sup></a><a class="footnote-ref" id="fnref:53" href="#fn:53"><sup>53</sup></a></li> <li>Crystal Writer<a class="footnote-ref" id="fnref:54" href="#fn:54"><sup>54</sup></a></li> <li><a href="/facts/Microsoft_Word/HPSu5W4j">Microsoft Word</a><a class="footnote-ref" id="fnref:55" href="#fn:55"><sup>55</sup></a><a class="footnote-ref" id="fnref:56" href="#fn:56"><sup>56</sup></a><a class="footnote-ref" id="fnref:57" href="#fn:57"><sup>57</sup></a></li> <li>Samna Word<a class="footnote-ref" id="fnref:58" href="#fn:58"><sup>58</sup></a></li> <li>SMART Word Processor<a class="footnote-ref" id="fnref:59" href="#fn:59"><sup>59</sup></a></li> <li>WordMarc<a class="footnote-ref" id="fnref:60" href="#fn:60"><sup>60</sup></a></li> <li><a href="/facts/WordStar/QWnaF7t7">WordStar</a> 2000<a class="footnote-ref" id="fnref:61" href="#fn:61"><sup>61</sup></a></li></ul> <h3>Games</h3> <ul><li>Chess</li> <li>Klondike<a class="footnote-ref" id="fnref:62" href="#fn:62"><sup>62</sup></a></li> <li>Life</li> <li>Mahjongg<a class="footnote-ref" id="fnref:63" href="#fn:63"><sup>63</sup></a></li> <li><a href="/facts/Larn_(video_game)/xy7bpstd">Larn</a></li> <li><a href="/facts/Moria_(1983_video_game)/y0MjcfaM">Moria</a></li> <li><a href="/facts/NetHack/qzbMvK3X">NetHack</a></li> <li><a href="/facts/Pac-Man/Hx1pqvUQ">Pac-Man</a> clone</li> <li>Robots</li> <li>Rocks (<a href="/facts/Asteroids_(video_game)/KVS49vQg">Asteroids</a> clone)</li> <li><a href="/facts/Rogue_(video_game)/4pWC2hM8">Super-Rogue 9.0</a></li> <li><a href="/facts/Tetris/djLfTK0n">Tetris</a> clone</li></ul> <h3>Utility</h3> <ul><li><a href="/facts/EMACS/BvGxuAxQ">EMACS</a></li> <li>HoneyDanBer <a href="/facts/UUCP/dQ055F7b">UUCP</a> package</li> <li><a href="/facts/KA9Q/V0ueNU7Y">KA9Q</a> (implements <a href="/facts/Serial_Line_Internet_Protocol/oqUaoA0f">SLIP</a>, built-in <a href="/facts/File_Transfer_Protocol/THuWgzfw">FTP</a>, <a href="/facts/Telnet/hxT0e85h">telnet</a>, <a href="/facts/Simple_Mail_Transfer_Protocol/TeCRKDpJ">SMTP</a>, <a href="/facts/Finger_(protocol)/5H803ane">finger</a> which are otherwise not available without installing the Ethernet software)</li> <li><a href="/facts/Kermit_protocol/NFqqhPMf">Kermit</a></li> <li><a href="/facts/ManaGeR/FmxEyrbS">MGR window system</a></li> <li>Pcomm (<a href="/facts/ProComm/N8DSGVxK">ProComm</a> clone)</li> <li>SPICE/NUTMEG (circuit simulation tool)<a class="footnote-ref" id="fnref:64" href="#fn:64"><sup>64</sup></a></li> <li><a href="/facts/TeX/HDrl3Yvd">TeX</a></li> <li>Various Shells: <a href="/facts/Bourne_Shell/wUCh3Qkl">Bourne</a>, <a href="/facts/C_Shell/8XRuIg0K">C</a>, and <a href="/facts/Korn_Shell/MMp8fQ4A">Korn</a></li></ul> <h2 id="expansion-cards">Expansion cards</h2> <p>The UNIX PC has three proprietary S4BUS slots for expansion cards: </p> <ul><li>DOS-73 <a href="/facts/Intel_8086/sS9dlSdK">8086</a> <a href="/facts/Co-processor/WsVXzAGo">co-processor</a> card running at 8 MHz, <a href="/facts/Hercules_Graphics_Card/EqVmDYVJ">Hercules graphics</a>-compatible, with 512 KB RAM, an RS-232 COM2 port and optional <a href="/facts/8087/YGDyGKAS">8087</a> math co-processor. Mouse, floppy, modem (on COM1), and printer are shared in a DOS session. <a href="/facts/MS-DOS_3.1/fVrrz1uN">MS-DOS 3.1</a> was included. This board was designed and built for AT&T by <a href="/facts/Alloy_Computer_Products/n79kqrh0">Alloy Computer Products</a> of Framingham, MA.</li> <li>RAM could be added using 512 KB RAM or 2 MB RAM cards, up to a maximum of 4 MB (2 MB on the motherboard and 2 MB on expansion cards).</li> <li>EIA/RAM combo cards contained extra RAM (512 KB, 1 MB, or 1.5 MB) and two <a href="/facts/RS-232/NCpvGuyq">RS-232</a> serial ports.</li> <li>Dual EIA port card (same card as the EIA/RAM but without the RAM sockets)</li> <li><a href="/facts/StarLAN/o6bo5pWW">StarLAN</a> 1 Mbit/s (1BASE5) network over twisted-pair wire <a href="/facts/Local_area_network/edUDxJ6J">local area network</a> typically used in <i>star</i> format</li> <li><a href="/facts/Ethernet/nMfhU8tU">Ethernet</a> 10 Mbit/s LAN card (<a href="/facts/AMD_Lance_Am7990/quYsoXUk">AMD Lance</a>-based) using <a href="/facts/Attachment_Unit_Interface/TMg2ru43">AUI</a> connector and <a href="/facts/The_Wollongong_Group/9yH7TMAf">Wollongong</a> TCP/IP stack/drivers</li> <li>AUDIX Voice Power (“Speech Processor”) card allowed for the capture and digital recording of voice conversations. This was an option of the "Integrated Solution" package for the <a href="/facts/AT%2526T_Merlin/crha0K48">AT&T System 25</a> <a href="/facts/Private_branch_exchange/eLWvlhzs">PBX</a> where the UNIX PC served as the "Master Controller".<a class="footnote-ref" id="fnref:65" href="#fn:65"><sup>65</sup></a></li> <li>PC/PBX Connection Package 4 for AT&T PBX System 75 or System 85</li> <li>Floppy Tape card provided interface for 23 MB MFM <a href="/facts/Tape_Drive/9MfLuCa0">Tape Cartridge Drive</a> (e.g. Cipher FloppyTape 525)</li> <li><a href="/facts/Quarter-inch_cartridge/keN0pjuf">QIC</a>-02 card for tape backup</li> <li>Expansion chassis card was hard-wired to the externally-powered Expansion Unit with five additional S4BUS slots (manufactured by Alloy Computer Products)</li> <li>Piiceon Model SR-2048 (2 MB) RAM expansion card</li></ul> <h2 id="public-domain-software">Public domain software</h2> <p><i>The STORE!</i> was a <a href="/facts/Public_domain_software/LUpdqQXQ">public domain software</a> repository provided by AT&T and accessible via dialup UUCP.<a class="footnote-ref" id="fnref:66" href="#fn:66"><sup>66</sup></a><a class="footnote-ref" id="fnref:67" href="#fn:67"><sup>67</sup></a> </p> <h2 id="emulation">Emulation</h2> <p>The FreeBee emulator is available at <a href="https://github.com/philpem/freebee">FreeBee</a> on <a href="/facts/GitHub/n1hNCsc3">GitHub</a>. </p> <h2 id="cancelled-successor">Cancelled successor</h2> <p>Three prototypes of a follow-on "P6" model were alleged to have been built<a class="footnote-ref" id="fnref:68" href="#fn:68"><sup>68</sup></a><a class="footnote-ref" id="fnref:69" href="#fn:69"><sup>69</sup></a> with the specifications claimed to be: </p> <ul><li><a href="/facts/Motorola_68020/LfHs3kMh">Motorola 68020</a></li> <li>Optional <a href="/facts/Motorola_68881/LTT5myBv">Motorola 68881</a> FPU</li> <li>SIMM sockets for up to 16 MB RAM</li> <li>Color monitor</li> <li>2400 baud modem</li> <li>60 MB QIC tape</li></ul> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/AT%2526T_6300_Plus/eGQY8rY7">AT&T 6300 Plus</a></li> <li><a href="/facts/Convergent_Technologies/38f58Aeg">Convergent Technologies</a></li> <li><a href="/facts/DEC_Professional_(computer)/sB6WvfdD">DEC Professional</a></li> <li><a href="/facts/IBM_RT_PC/HqTqSLBz">IBM RT PC</a></li> <li><a href="/facts/IBM_System_9000/9yCPSzSS">IBM System 9000</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://books.google.com/books?id=zC4EAAAAMBAJ&pg=PA15">AT&T Leapfrogs IBM With the Unix PC.</a>, <a href="/facts/InfoWorld/EJ0zA8FV">InfoWorld</a>, April 15, 1985, pp. 15–17</li> <li><a href="https://archive.org/details/byte-magazine-1985-05">The AT&T Unix PC</a>, article from BYTE magazine Volume 10 Number 05: Multiprocessing (May 1985), pp. 98–106</li> <li><a href="https://archive.org/details/byte-magazine-1986-05">The AT&T Unix PC Review</a>, article from BYTE magazine Volume 11 Number 05: Multiprocessing (May 1986), pp. 254–262</li> <li><a href="http://www.faqs.org/faqs/3b1-faq/">comp.sys.3b1 FAQ</a></li> <li><a href="http://unixpc.taronga.com">AT&T 3B1/7300 (UNIX PC) Information</a></li> <li><a href="https://web.archive.org/web/20101121033454/http://www.old-computers.com/museum/computer.asp?st=1&c=1164">AT&T UNIX PC at old-computers.com</a></li> <li><a href="http://bitsavers.trailing-edge.com/pdf/att/3b1/">http://bitsavers.trailing-edge.com/pdf/att/3b1/</a></li> <li><a href="http://www.unixpc.org">http://www.unixpc.org</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>CBR Staff Writer (December 13, 1988). "UNISYS Corp Puts Ely in Charge of $2,000m UNIX Group". Tech Monitor. New Statesman Media Group Ltd. Retrieved November 29, 2021. <a href="https://techmonitor.ai/technology/unisys_corp_puts_ely_in_charge_of_2000m_unix_group" target="_blank">https://techmonitor.ai/technology/unisys_corp_puts_ely_in_charge_of_2000m_unix_group</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"3b1 FAQ". unixpc.org. Retrieved 1 August 2019. <a href="http://www.unixpc.org/FAQ" target="_blank">http://www.unixpc.org/FAQ</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"NEW AT&T COMPUTER OFFICE GEAR". Chicago Tribune. March 27, 1985. <a href="https://www.chicagotribune.com/news/ct-xpm-1985-03-27-8501170246-story.html" target="_blank">https://www.chicagotribune.com/news/ct-xpm-1985-03-27-8501170246-story.html</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>AT&T, Select Code 999-601-311IS, AT&T UNIX PC Owner's Manual (1986) <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Howitt, Doran (1984-04-08). "At Last, AT&T's 7300/Unix PC". Infoworld. p. 17. Retrieved 2019-08-01. <a href="https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17" target="_blank">https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"3b1 FAQ". unixpc.org. Retrieved 1 August 2019. <a href="http://www.unixpc.org/FAQ" target="_blank">http://www.unixpc.org/FAQ</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01. <a href="https://tech-insider.org/unix/research/acrobat/8605.pdf" target="_blank">https://tech-insider.org/unix/research/acrobat/8605.pdf</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>Howitt, Doran (1984-04-08). "At Last, AT&T's 7300/Unix PC". Infoworld. p. 17. Retrieved 2019-08-01. <a href="https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17" target="_blank">https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>"AT&T PC 7300". Starring the Computer. <a href="http://www.starringthecomputer.com/computer.html?c=50" target="_blank">http://www.starringthecomputer.com/computer.html?c=50</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>Petrosky, Mary (October 14, 1985). "6300 Plus Launched By AT&T". InfoWorld. 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Retrieved 2019-08-01. <a href="https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17" target="_blank">https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></p></li> <li id="fn:37"><p>"3b1 FAQ". unixpc.org. Retrieved 1 August 2019. <a href="http://www.unixpc.org/FAQ" target="_blank">http://www.unixpc.org/FAQ</a> <a href="#fnref:37" class="footnote-back-ref">↩</a></p></li> <li id="fn:38"><p>Howitt, Doran (1984-04-08). "At Last, AT&T's 7300/Unix PC". Infoworld. p. 17. Retrieved 2019-08-01. <a href="https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17" target="_blank">https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17</a> <a href="#fnref:38" class="footnote-back-ref">↩</a></p></li> <li id="fn:39"><p>"3b1 FAQ". unixpc.org. 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Retrieved 1 August 2019. <a href="http://www.unixpc.org/FAQ" target="_blank">http://www.unixpc.org/FAQ</a> <a href="#fnref:43" class="footnote-back-ref">↩</a></p></li> <li id="fn:44"><p>"3b1 FAQ". unixpc.org. Retrieved 1 August 2019. <a href="http://www.unixpc.org/FAQ" target="_blank">http://www.unixpc.org/FAQ</a> <a href="#fnref:44" class="footnote-back-ref">↩</a></p></li> <li id="fn:45"><p>"3b1 FAQ". unixpc.org. Retrieved 1 August 2019. <a href="http://www.unixpc.org/FAQ" target="_blank">http://www.unixpc.org/FAQ</a> <a href="#fnref:45" class="footnote-back-ref">↩</a></p></li> <li id="fn:46"><p>Howitt, Doran (1984-04-08). "At Last, AT&T's 7300/Unix PC". Infoworld. p. 17. Retrieved 2019-08-01. <a href="https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17" target="_blank">https://books.google.com/books?id=0S4EAAAAMBAJ&pg=PA17</a> <a href="#fnref:46" class="footnote-back-ref">↩</a></p></li> <li id="fn:47"><p>"Samna Plans Unix-based Product Line". InfoWorld. 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