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{{Short description|American electronics company}}
{{Infobox company
| name = Micro Instrumentation and Telemetry Systems,
| logo = MITS LOGO 1973.svg
| type = Private
| industry = [[Computer hardware]]
| fate = Acquired by [[Pertec
| founded = {{Start date
| founder = [[Ed Roberts (computer engineer)|Ed Roberts]], [[Forrest Mims]]
| hq_location_city = Albuquerque, New Mexico
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| homepage =
}}
'''Micro Instrumentation and Telemetry Systems, Inc.''' ('''MITS'''), was an American electronics company founded in [[Albuquerque, New Mexico]] that began manufacturing electronic [[calculator]]s in 1971 and personal [[computers]] in 1975.<ref name = "CC Nov 1984">{{cite magazine | last = Mims | first = Forrest M. | title = The Altair story: the early days at MITS | magazine = Creative Computing | volume = 10 | issue = 11 | page = 17 | date = November 1984 | url = http://www.atarimagazines.com/creative/v10n11/17_The_Altair_story_early_d.php | access-date = 2009-07-27 | archive-date = 2007-04-08 | archive-url = https://web.archive.org/web/20070408035039/http://www.atarimagazines.com/creative/v10n11/17_The_Altair_story_early_d.php | url-status = dead }}</ref>
[[Ed Roberts (computer engineer)|Ed Roberts]] and [[Forrest Mims]] founded MITS in December 1969 to produce miniaturized [[telemetry]] modules for model rockets such as a roll rate sensor.<ref name = " Model Rocketry Apr 1970" >{{cite journal | last = Mandell | first = Gorden | title = From the launching pad | journal = Model Rocketry | volume = 2 | issue = 9 | page = 5 | publisher = Model Rocketry, Inc | ___location = Cambridge, MA | date = April 1970 | url = http://www.ninfinger.org/~sven/rockets/ModelRocketry/ModelRocketry.html }}The editor describes the first MITS modules with photo of the units.</ref> In 1971, Roberts redirected the company into the electronic calculator market and the MITS 816 desktop calculator kit was featured on the November 1971 cover of ''[[Popular Electronics]]''.<ref name="MITS 816"/> The calculators were very successful and sales topped one million dollars in 1973. A brutal calculator price war left the company deeply in debt by 1974.
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=== Founders ===
[[Henry Edward Roberts]] studied Electrical Engineering at the [[University of Miami]] before enlisting in the [[
Forrest Mims was interested in science and electronics as a youth and even built an [[analog computer]] while in high school.<ref name = "ME 1987">{{cite magazine | last = Mims | first = Forrest | title = A Homebrew Analog Computer |magazine= Modern Electronics | volume = 4 | issue = 12 | pages =39–41 | date = December 1987 | issn = 0748-9889}}Mims describes the analog computer he built in high school. The article has a photograph and schematics of the computer.</ref> Mims graduated from [[Texas A&M University]] in 1966 (major in government with minors in English and history) then became a commissioned officer in the U.S. Air Force.<ref name = "Blind">{{cite news | title = New Device Helps The Blind | work = The San Antonio Light | page = 2 | date = April 15, 1966| quote = Although a political science major at A&M, Mims's second interest obviously is 'science and inventing things.'}}</ref> While serving in [[Vietnam]] as an intelligence officer, Mims continued his model rocket hobby.<ref name = "Rocketry in Vietnam">{{cite journal | last = Mims | first = Forrest M. | title = Model Rocketry in Vietnam | journal = Model Rocketry | volume = 2 | issue = 4 | pages =23–25 | publisher = Model Rocketry, Inc | ___location = Cambridge, MA | date = January 1970 | url = http://www.ninfinger.org/~sven/rockets/ModelRocketry/ModelRocketry.html}}</ref> At Texas A&M, Mims developed an infrared obstacle-sensing device and he experimented with it at the Saigon School for Blind Boys and Girls. Launching model rockets in an area accustomed to rocket attacks and working with blind children resulted in a story in the military newspaper, [[Stars and Stripes (newspaper)|''Stars and Stripes'']].<ref name = "Stars Stripes 1967">{{cite journal | title = There Is No Substitute For Talent | journal = Pacific Stars and Stripes | volume = 23 | issue = 291 | page =9 | ___location = Tokyo, Japan | date = October 19, 1967}}</ref> This caught the attention of an Air Force Colonel, who arranged for Mims to be assigned to the Weapons Laboratory at Kirtland AFB even though Mims lacked an engineering degree.
Roberts and Mims were both assigned to the Lab's Laser Group in 1968. Roberts had reactivated Reliance Engineering and built an infrared intrusion alarm for his uncle's fish farm in [[Florida]]. Later, Roberts and Stan Cagle, a civilian worker who also went to Oklahoma State, started building a power supply they hoped to sell.
===Model rocket kits===
[[File:MITS Rocket Light Flasher.jpg|thumb|right| Transistorized tracking light for model rockets. The product that launched MITS]]
<blockquote>Reliance Engineering in Albuquerque, New Mexico has announced the formation of a subsidiary company for the manufacture of miniaturized electronic and telemetry systems designed for model rockets. The company is called Micro Instrumentation and Telemetry Systems (MITS). Reliance Engineering president Henry Roberts announced that "MITS is presently conducting an intensive research program involving high quality miniature telemetry systems."</blockquote>
<blockquote> The first commercially available model rocket telemetry transmitter is among the first items to be offered by MITS. Accessory modules including a tone beacon, temperature sensor, and a roll rate sensor, as well as tracking lights, ground systems for data reduction, and light weight, water activated batteries will soon be available.<ref name = "Press Release 1969">{{cite journal | title = New Product Notes | journal = Model Rocketry | volume = 2 | issue = 3 | page =37 | publisher = Model Rocketry, Inc | ___location = Cambridge, MA | date = December 1969 | url = http://www.ninfinger.org/~sven/rockets/ModelRocketry/ModelRocketry.html}}</ref> </blockquote>
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They designed and built the telemetry modules in their homes and garages but they were only able to sell a few hundred units. Mims had sold a feature article about the new solid-state device, light-emitting diodes, to ''[[Popular Electronics]]'' (circulation 400,000) that May. With the hope of selling kits to the larger readership; Roberts and Mims designed a device that would transmit voice over a beam of light, the Opticom. The editors accepted the project story and both articles were featured on the cover of the November 1970 issue. The payment for the articles was $400 but meeting Les Solomon, ''[[Popular Electronics]]'' technical editor, proved to be significant to both Mims and Roberts future success.
In August 1970, Les Solomon, his wife and daughter were on vacation in the southwest and arranged to visit Mims, Roberts and their families. At that time, [[Daniel Meyer (engineer)|Dan Meyer]] and [[Don Lancaster]] were among the most prolific authors in ''Popular Electronics''. Meyer had built a million dollar a year business that sold kits of parts to build the project that he and Lancaster wrote about.<ref name = "News Express 1972">{{cite news | last = Barnes | first = Bill | title = Do-It Yourselfers Propel Kit Maker to High Levels | work = San Antonio Express-News | page = 10, Business Section | date = November 19, 1972}}</ref> Mims and Roberts wanted to do the same and quizzed Solomon on the kit business. Solomon gave them some statistics but said there was no way of knowing how many kits an article would sell, maybe a hundred, maybe a thousand.
MITS had purchased components to build 200 Opticoms but only sold around 100 units. Roberts wanted to design a new electronic calculator kit but his partners wanted out. Bob Zaller had already left MITS and Forrest Mims was out of the Air Force and wanted to become a full-time writer. Roberts bought his 3 partners out for $600 in cash and $350 in equipment.
== Calculators ==
[[File:MITS Calculator 1200 Series 1973 advertisement.jpg|thumb|right| Sales had reached $100,000 per month when this advertisement ran in March 1973.]]
Ed Roberts' interest in computers began in high school when he built a simple digital computer from relays. His first real experience with computers came while at [[Oklahoma State University]] where engineering students had free access to an [[IBM 1620]] computer. Roberts' office at Weapons Laboratory had the state of the art [[Hewlett-Packard 9100A]] programmable calculator in 1968. In July 1970, a semiconductor company, [[Electronic Arrays]], announced a set of six LSI ICs that would make a four-function calculator.<ref name = "EAS100">{{cite journal | title = New Products: Do-it-yourself Electronic Calculator | journal = Computer | volume = 3 | issue = 6 | pages =38–41 | publisher = IEEE | date = November 1970 | url = https://books.google.com/books?id=GJ2wAAAAIAAJ&q=%22Electronic+Arrays%22+Calculator | doi = 10.1109/C-M.1970.216730 | quote = Electronic Arrays has developed the EAS100, a set of MOS LSI circuits for a 16 digit calculator with 8 digit display capability.| url-access = subscription }}</ref><ref name = "Calculator Patent">{{US patent reference | number = 3800129 | y = 1974 | m = 03 | d = 26 | inventor = Richard H. Umstattd | title = MOS Desk Calculator}} The Electronic Arrays, Inc. calculator chip set that was used in the MITS 816 calculator.</ref> Roberts was determined to design a calculator kit.
To fund the new project, Roberts sold 15% of MITS to fellow Air Force officer, Lieutenant William Yates. He also got an investment from another Weapons Laboratory officer, Major Ed Laughlin. Several other officers and
The MITS 816 was known as a "four-function" calculator; it could add, subtract, multiply and divide. The display was only 8
The steady flow of calculator sales allowed MITS to run full page advertisements in ''Radio-Electronics'', ''Popular Electronics'' and ''Scientific American''. In the June 1972 ''Radio-Electronics'', MITS announced a 14 digit calculator (Model 1440) with memory and square root function for $199.95 kit and $249.95 assembled. The original 816 kit was reduced from $179 to $149.95. Both calculators could be controlled by upcoming programming unit.<ref name = "RE June 1972">{{cite magazine | title = MITS announces our forth generation. |magazine= Radio-Electronics | volume = 43 | issue = 6 | page =13 | date = June 1972}} Full page advertisement of the Model 1440 calculator.</ref>
The monthly sales reached $100,000 in March 1973 and MITS moved to larger building with 10,000 square feet (930 square meters) of space.<ref name = "Albq Tribune Apr 1973">{{cite news | last = Lucas | first = Urith | title = Albq calculator firm to expand plant, triple number of employees | work = The Albuquerque Tribune | page = C14 | date = April 20, 1973}} Summary: MITS to move to the Cal-Lin Building, 6328 Linn NE in May. Now at 5404 Coal SE. Employment is expected to rise from 62 to 180 or 200. Company will have 10,000 square feet on one floor. Calculator sales reached $100,000 in March.</ref> To meet the demand for assembled calculators, an automated [[Wave soldering|wave solder machine]] was installed.<ref>{{harvp|Roberts
The functionality of calculator ICs increased at a rapid pace and Roberts was designing and producing new models. The MITS 7400 scientific and engineering calculator was introduced in December 1972. It featured trigonometric functions, polar to rectangular conversion, two memories, and up to a seven-level [[Stack (data structure)|stack]]. A kit with a three-level stack was $299.95 and an assembled unit with a seven-level stack was $419.95.<ref name = "RE December 1972">{{cite magazine | title = A New Standard! MITS 7400 Scientific and Engineering Calculator |magazine= Radio-Electronics | volume = 43 | issue = 12 | page =17 | date = December 1972}} Full page advertisement of the Model 7400 scientific calculator.</ref> The next month the Series 1200 four-function pocket calculators were announced. The six-digit model was $59.95 and the twelve-digit model was $99.95.
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=== Price wars ===
[[Bowmar Instrument Corporation]] introduced the "Bowmar Brain", a four-function pocket calculator, in September 1971 and the $179 calculator sold over 500,000 copies in the first year. Bowmar then developed the "901B" calculator that was priced at $120.<ref name = "Schnaars 1997">{{cite book | last = Schnaars | first = Steven P. | title = Marketing Strategy: Customers And Competition | publisher = Simon and Schuster | year = 1997 | page = 48 | url = https://books.google.com/books?id=vvfmcTAGdloC&pg=PA48 | isbn = 978-0-684-83191-6}}</ref> In September 1972, [[Texas Instruments]] (TI) introduced the TI-2500 portable four-function calculator that also sold for $120.<ref name = "Computer 1972">{{cite journal | title = New Products | journal = Computer | volume = 5 | issue = 6 | pages =59–63 | publisher = IEEE | date = November 1972 | doi = 10.1109/C-M.1972.216999 | quote = The TI-2500 portable electronic calculator is a four-function, full-floating decimal-point unit with an eight-digit light emitting-diode display. With a suggested retail price of under $120, the TI-2500 calculator is rechargeable and capable of portable or ac operation.}} The calculator was previewed in June 1972 and formally released on September 21, 1972</ref> The 901B and the TI-2500 both used the TI TMS0100 family of "calculator-on-a-chip" integrated circuit. TI was now directly competing with their IC customers. Other semiconductor companies such as National Semiconductor and Rockwell began selling calculators. [[
To compete in this market, Roberts needed more capital. He took MITS public in November 1973 with a stock offering of 500,000 shares at $1 each. The [[1973 oil crisis]] caused a stock market downturn and MITS was only able to sell 250,000 shares.
MITS was now $300,000 in debt and Roberts was looking for a new hit product. He decided to return to the kit market with a low cost computer. The target customer would think that "some assembly required" was a desirable feature. Roberts had looked at the [[Intel 4004]] for calculators and thought the [[Intel 8008]] was limited and difficult to work with, so he chose the most recent [[
==''Popular Electronics'' and ''Radio-Electronics''==
In January 1972, ''Popular Electronics'' changed its editorial focus in an attempt to attract more advertising revenues. Reviews of stereo equipment and [[
''Radio-Electronics'' had a smaller circulation than ''Popular Electronics'' but led the way with innovative construction projects between 1972 and 1975. John Simonton's first modular electronic music synthesizer was featured on the cover of the May 1973 issue.<ref name = "Simonton 1973">{{cite magazine | last = Simonton | first = John | author-link = John Simonton | title = Build a Modular Electronic Music Synthesizer |magazine= Radio-Electronics | volume = 44 | issue = 5 | pages =38–41 | date = May 1973}}</ref> It sold for a fraction of commercial synthesizers and his [[PAiA Electronics]] produced them for decades. Don Lancaster's [[TV Typewriter]] in September 1973 and Jon Titus's [[Mark-8]] computer in July 1974 were the catalyst of the home computer revolution.
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| publisher = Bonnier Corporation }}ADM-3A Terminal cost $795 (kit) and $895 (assembled).</ref> Most of these computers had a front panel with toggle switches for entering data and lights for displaying it. These were normally used to boot the computer and to diagnose problems.
The Altair 8800 kit came with a front panel, a CPU board with the Intel 8080 microprocessor, 256 bytes of RAM, a 4-slot backplane and an 8-amp power supply for $439.<ref name = "MITS Price List">{{cite magazine | author = MITS |date=August 1975 | title = Worlds Most Inexpensive BASIC language system |magazine= Popular Electronics | volume = 8 | issue = 2 | page =1 | publisher = Ziff Davis}}</ref> A 1k byte memory board was $176 and the 4k byte board was $264. The serial interface board was $124 and the parallel interface was $119. The Teletype Model 33 ASR was $1500. There was a special price for an 8k byte system with [[Altair BASIC]] ([[Microsoft]]'s first ever product) for $995. [[Bill Gates]]
When the January 1975 issue of ''Popular Electronics'' reached readers in mid December 1974, MITS was flooded with orders. They had to hire extra people just to answer the phones. In February, MITS received 1,000 orders for the Altair 8800. The quoted delivery time was 60 days but it was many more months before the machines were shipped. By August 1975, they had shipped over 5,000 computers.<ref name = "Byte Oct 1975">{{cite magazine | last = Green | first = Wayne |date=October 1975 | title = From the Publisher .. Are they real? |magazine= BYTE | volume = 1 | issue = 2 |pages=61, 81, 87 | publisher = Green Publishing}} In August 1975, Wayne Green visited several personal computer manufacturers. A photo caption in his trip report says; "Meanwhile, at MITS, over 5,000 Altair 8800's have been shipped. Here is a view of part of the production line."</ref>
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Godbout also sold components to [[Processor Technology]] for their 4K Static RAM board and serial / parallel interface board. [[Lee Felsenstein]] designed an Altair compatible video board that provided 16 lines of 64 upper and lower case characters on a black and white television. This $160 board became very popular and led to the Processor Technology [[Sol-20]] Computer in 1976.<ref name = "VDM-1">{{cite magazine | date = February 1976 | title = Introducing VDM-1|magazine= Popular Electronics | volume = 9 | issue = 2 | page =100}} Processor Technology Video Display advertisement. Features 16 lines, 64 characters, upper and lower case. $160</ref>
The [[IMSAI 8080]], the first "clone" of the Altair computer, was released in December 1975.<ref name = "ComputerLand">{{cite book | last = Littman | first = Jonathan | title = Once Upon a Time in ComputerLand: The Amazing, Billion-Dollar Tale of Bill Millard | publisher = Price Stern Sloan | date =1987 | page = 18 | ___location = Los Angeles | isbn = 0-89586-502-5 | url=https://archive.org/details/onceupontimeinco0000litt/ | url-access=registration }} "Later that day, December 16 [1975], United Parcel Service picked up the first shipment of 50 IMSAI computer kits for delivery to customers."</ref> It corrected many shortcomings of the original Altair 8800 by providing a larger power supply, a 22 slot motherboard, and easier wiring of the front panel. Ed Roberts reviewed the IMSAI in his April 1976 column in ''Computer Notes'', and agreed that the IMSAI was in some ways better than the original Altair. Roberts also pointed out that the new Altair 8800B was superior to the IMSAI 8080 and the upgraded Altair 8800A fixed the same issues that the IMSAI did.<ref name="CN April 197 p36">{{cite journal|last=Roberts |first=Ed |title=Ramblings from Ed Roberts |journal=Computer Notes |volume=1 |issue=11 |page=3 |publisher=MITS |___location=Albuquerque NM |date=April 1976 |url=http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=76_4&p=3 |url-status=unfit |archive-url=https://web.archive.org/web/20120323162008/http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=76_4&p=3 |archive-date=March 23, 2012 }}</ref>
Altair computers were only available from the 20 or so authorized Altair computer dealers, but the IMSAI 8080, Processor Technology Sol and many other clones were sold by hundreds of newly opening computer stores.
The S-100 bus was used throughout the 1980s until it was overtaken by the IBM PC [[Industry Standard Architecture|ISA]] bus. [[Seattle Computer Products]] (SCP) was a manufacturer of S-100 memory boards. The company's engineer, [[Tim Paterson]], designed an [[Intel 8086]] [[
=== Altair BASIC ===
{{Main|Altair BASIC}}
[[File:Altair Computer Ad August 1975.jpg|thumb|right| An Altair 8800 kit with 8 KB of memory and Altair BASIC cost only $995 in August 1975.]]
In December 1974 Bill Gates was a student at [[Harvard University]] and Paul Allen worked for [[Honeywell]] in Boston. They saw the Altair 8800 computer in the January 1975 issue of ''Popular Electronics'' and knew it was powerful enough to support a [[BASIC]] interpreter.<ref>The January 1975 issue of ''Popular Electronics'' was published on November 29, 1974. [[:File:Copyright Popular Electronics 1975.jpg|Copyright record.]]</ref> They wanted to be the first to offer BASIC for the Altair computer, and the software development tools they had previously created for their [[Intel 8008]] microprocessor based [[Traf-O-Data]] computer would give them a head start.
Harvard had a [[Digital Equipment Corporation|DEC]] [[PDP-10]] that was available for student use. They would use it to develop BASIC.<ref name="harddrive PDP-10">{{cite book | last=Wallace | first=James | author2=Jim Erickson | title=Hard Drive: Bill Gates and the Making of the Microsoft Empire | publisher=John Wiley & Sons | year=1992 | pages=[https://archive.org/details/harddrivebillgat00wall_0/page/81 81–83] | isbn=0-471-56886-4 | url=https://archive.org/details/harddrivebillgat00wall_0/page/81 }}"When Harvard officials found out that he (Gates) and Allen had been making extensive use of the university's PDP-10 to develop a commercial product, they were not pleased." The computer was funded by the Department of Defense and was under the control of Professor Thomas Cheatham. "Although DARPA was funding the PDP-10 at Harvard, there was no written policy regarding its use."</ref> While Allen modified their development software for the new 8080 microprocessor, Gates began writing 8080 assembly language by hand on yellow legal pads. They enlisted another Harvard student, [[Monte Davidoff]], to write the math routines.
By early February the program coding switched from legal pads to the PDP-10 and a preliminary version was completed by March 1975.<ref>{{harvp|Manes
The April 1975 issue of the Altair Newsletter, Computer Notes, had a banner headline "Altair BASIC - Up and Running". The software was to begin shipping on June 23, 1975.<ref name="CN April 1975">{{cite journal|title=Altair BASIC - Up and Running |journal=Computer Notes |volume=1 |issue=1 |pages=1, 3 |publisher=MITS |___location=Albuquerque NM |date=April 1975 |url=http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=75_4&p=00 |url-status=unfit |archive-url=https://web.archive.org/web/20120323162008/http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=75_4&p=00 |archive-date=March 23, 2012 }} The publication date was April 7, 1975</ref> The software price was $500, but discounted to $75 with the purchase of an Altair computer with 8k bytes of memory and a serial I/O card.
On July 22, 1975 MITS signed a contract for the Altair BASIC with Bill Gates and Paul Allen. They received $3000 at signing and a royalty for each copy of BASIC sold; $30 for the 4K version, $35 for the 8K version and $60 for the expanded version. The contract had a cap of $180,000. MITS received an exclusive worldwide license to the program for 10 years. They also had exclusive rights to sub-license the program to other companies and agreed to use its "best efforts" to license, promote and commercialize the program. MITS would supply the computer time necessary for development; a PDP-10 owned by the Albuquerque school district.
The price of Altair BASIC to customers who purchased additional memory and I/O boards from MITS was $75. Users may have gone along with that if the memory board were reliable. Customers bought the computer from MITS, and working memory from companies like Processor Technology. Rather than pay $500 for BASIC, they would acquire bootleg copies of the software. Only about ten percent of the early customers actually purchased BASIC.<ref>{{harvp|Manes
[[File:Altair 680.jpg|thumb|Altair 680]]
MITS had announced a new computer based on the [[Motorola 6800]] microprocessor in November 1975, the {{visible anchor|Altair 680}}. The machines were supposed to ship in January 1976, but hardware design problems delayed shipment until May.<ref name="CN Apr 1976">{{cite journal|last=Pollini |first=Steve |title=680-b ready for production |journal=Computer Notes |volume=1 |issue=11 |page=8 |publisher=MITS |date=April 1976 |quote=MITS is now ready to begin full production of the Altair 680b |url=http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=76_4&p=8 |url-status=unfit |archive-url=https://web.archive.org/web/20120323162008/http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=76_4&p=8 |archive-date=March 23, 2012 }}</ref> Paul Allen rewrote their 8080 simulator to support the 6800 microprocessor. Ric Weiland, a high school friend of Gates and Allen, converted the Altair BASIC's 8080 assembly language to 6800 assembly language. To eliminate the per copy royalty loss issue, the 6800 BASIC was licensed to MITS on a non-exclusive basis for a flat fee of $31,200.
The January 1976 issue of MITS's newsletter, Computer Notes, carried an ad for 8080 BASIC. The last paragraph stated: "Licenses for source listing and rights to distribute the binaries are also available to OEM buyers. Write or call Mr. Paul Allen at the MITS plant in Albuquerque for more detailed information."<ref name="CN Jan 1976">{{cite journal|title=8080 BASIC |journal=Computer Notes |volume=1 |issue=7 |page=6 |publisher=MITS |date=January 1976 |url=http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=76_1&p=6 |url-status=unfit |archive-url=https://web.archive.org/web/20120323162008/http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=76_1&p=6 |archive-date=March 23, 2012 }}</ref> Microsoft found several corporate customers for BASIC and proceeds were evenly split with MITS. Pertec acquired MITS in December 1976 and refused to allow any more OEM deals, even though the agreement required MITS to use their "best efforts" to license the software. The contract required MITS and Microsoft to use binding arbitration to settle disputes. In September 1977, the arbitrator ruled in favor of Microsoft, MITS could continue to use BASIC on their machines but lost the exclusive license. Microsoft could license the software to anyone and keep all of the royalties.
There was no longer a business requirement to remain in Albuquerque so Microsoft wanted to relocate to a larger city that would be more attractive to new employees. The San Francisco bay area was considered but Allen and Gates decided to return home to Seattle. Microsoft moved to Bellevue, Washington in January 1979.
== Sale to Pertec ==
{{pic|Micro Instrumentation and Telemetry Systems later logo.svg|Logo of MITS under ownership of Pertec}}
In 1976, MITS had 230 employees and sales of $6 million.<ref name = "Altair Sales 1976">{{cite news | last = McElheny | first = Victor K. | title = Computer Show: Preview Of More Ingenious Models | work = The New York Times | pages = D1, D5 | date = June 16, 1977 | quote = J. David Callan, head of Pertec's Microsystems division, which includes the Altair line and Icom, of Canoga Park, Calif., maker of computer peripheral equipment for such small computers, said that Altair sales totaled about $6 million last year.}}</ref><ref name = "SCCS Interface 1976">{{Cite journal | title = Here Comes PCC | journal = SCCS Interface | volume = 1 | issue = 10 | pages =26–29 | publisher = Southern California Computer Society | ___location = Santa Monica, CA | date = January 1977}} Interview with Ryal Poppa, president of Pertec Computer Corporation, about the acquisition of MITS.</ref> Roberts was tiring of his management responsibilities and was looking for a larger partner. MITS had always used [[Pertec Computer]] Corporation disk drives<ref name = "Small Systems 1978">{{cite book | last = Boonham | first = J. C. | title = Small Systems Computer Sourcebook | year = 1978 | pages = 68–69 | url = https://books.google.com/books?id=RsAOAAAAQAAJ&pg=PA68 | isbn = 978-0-470-26295-5 | publisher = Taylor & Francis}}</ref> and on December 3, 1976, Pertec signed a letter of intent to acquire MITS for $6 million in stock.<ref>Manes (1993), 101.</ref> The deal was completed in May 1977 just before the National Computer Conference in Dallas, Texas. Roberts got $2 million and the other 500 MITS shareholders (including the Altair co-designer, William Yates) split the rest.<ref name = "Albq Journal Dec 1976">{{cite news | title = Company Planning to Buy City Firm | work = Albuquerque Journal | page = B-6 | date = December 15, 1976}} MITS had approximately 500 shareholders and annual sales of $6 million.</ref>
Pertec was eager to increase sales to small businesses through the 26 Altair Computer stores across the United States. The marketing toward hobby/home user was curtailed. The November 1977 issue of the MITS newsletter, Computer Notes, was the last produced by the Albuquerque staff. There was one more issue produced by the Pertec staff in [[Chatsworth, California]].<ref name="Computer Notes - Last">{{cite journal|title=Publication notes |journal=Computer Notes |volume=3 |issue=7 |page=2 |publisher=Pertec Computer Corporation. |date=January–February 1978 |url=http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=78_1&p=2 |url-status=unfit |archive-url=https://web.archive.org/web/20120323162008/http://startup.nmnaturalhistory.org/gallery/notesViewer.php?ii=78_1&p=2 |archive-date=March 23, 2012 }}</ref> The back cover of the leading home computer magazine, [[Byte (magazine)|Byte]], always carried a full page Altair advertisement. This ended with the September 1977 issue. Roberts and Yates stayed on and worked on special projects.
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The Altair products were merged into the Pertec line and the MITS facility was used to produce the PCC-2000 small-business computer. The Albuquerque plant was closed in December 1980 and the production was moved to Pertec plants in Irvine, California.<ref name = "InfoWorld Dec 1980">{{cite magazine | last = Milewski | first = Richard | title = Last Vestige of Mits Closes |magazine= InfoWorld | volume = 2 | issue = 22 | page =7 | date = December 8, 1980 | url = https://books.google.com/books?id=mD4EAAAAMBAJ&pg=PT6 | issn = 0199-6649 | publisher = InfoWorld Media Group, Inc.}}</ref>
By the end of 1977 Roberts left MITS and returned to Georgia to be a gentleman farmer. He studied medicine at [[Mercer University]] in Macon, Georgia and graduated with a [[
== Works cited ==
*{{cite book | last = Ceruzzi | first = Paul E. | title = A History of Modern Computing | publisher = MIT Press | year = 2003 | ___location = Cambridge, MA | isbn = 0-262-53203-4 | url = https://archive.org/details/historyofmodernc00ceru_0 | url-access=registration }}
*{{cite book |
*{{cite book | last = Mims | first = Forrest M | author-link = Forrest Mims | title = Siliconnections: Coming of Age in the Electronic Era | publisher = McGraw-Hill | year = 1986 | ___location = New York | isbn = 978-0-07-042411-1 | url = https://archive.org/details/siliconnectionsc00mims | url-access=registration }}
*{{cite book |
*{{cite book | last = Young | first = Jeffrey S. | title = Forbes Greatest Technology Stories: Inspiring Tales of the Entrepreneurs | url = https://archive.org/details/forbesgreatest00youn | url-access = registration | publisher = John Wiley & Sons | year =1998 | ___location =New York | isbn = 0-471-24374-4
==Notes==
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*[http://www.vintagecalculators.com/html/mits_150.html MITS 150 Handheld Calculator at Vintage Calculators Web Museum]
*[http://datamath.org/BASIC/DATAMATH/ti-2500-1.htm TI-2500 at Datamath Calculator Museum]
*[http://www.vintage-computer.com/altair8800.shtml Altair 8800 Computer at Vintage-Computer Web Site] {{Webarchive|url=https://web.archive.org/web/20111210091503/http://www.vintage-computer.com/altair8800.shtml |date=2011-12-10 }}
*[https://web.archive.org/web/20090408081557/http://www.sunandsky.org/MITS_History.php Forrest Mims - Early Days At MITS]
*[https://web.archive.org/web/20111005221730/http://www.altair32.com/Altair32history.htm Brief History of the Altair. Copies of Altair articles in ''Popular Electronics'']
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