Sinclair Research Ltd.

3 Sinclair Plaza, Nashua, NH 03061

Sinclair Research was the most recognizable of a series of names for a company Clive Sinclair started to produce his many inventions.

Sinclair Research designed, marketed and sold the MK-14, ZX80, ZX81, ZX Spectrum, QL and a variety of other products.

Ruth Bramley - Working at Sinclair Research from 1981 to 1984


ZX80 TS 1000
A selection of 11 exciting games for the unexpanded ZX81 or T/S1000 computer. Games include: Slot Machine, Etch and Sketch, Slalom Ski, Catch Me If You Can, Space Pirate, Spacefire (2 versions), Car Crash, Man-Eating Budgies, Maze and the Wall.
TS 1000
The new BASIC allows the use of floating point arithmetic to nine digit accuracy, and contains log and trig functions with inverses. This ROM facilitates improved graphics, and contains 37 new functions including DRAW, DATA, ARCSIN, VAL, and SCROLL. The plug-in conversion includes a new keyboard template and a supplementary manual.
Contains astromap, giving access to information on 800 stars and other celestial objects. 16K.
TS 1000
Great for beginning players. If one player tries to perform an illegal move, the screen prints out an explanation of why it is illegal. Columns are marked with letters, beginning at A on the upper right. It has four levels and a doubling cube. 16K.
Downloadable TS 1000
7 programs to help with addition, subtraction, multiplication, division, and spelling. Crash, Multiply, Train, Fractions, Addsub, Division, Spelling. 7-11 year olds. 16K.
TS 1000
Math: 4 arithmetic functions at 3 levels of difficulty. Balance: See-saw theory. Volumes: Cube is drawn with dimensions given. Averages: Mean and mode. Bases: Decimal to other bases. Temp: Find resultant temperature from mixing 2 barrels of water at different temperatures. 9-14 year olds. 1K.
All legal moves including castling and en passant. High resolution graphics and 6 levels of play are supported. Special feature lets you set-up the board to study chess strategy. 16K.
Downloadable TS 1000
Self-paced course that teaches the ins and outs of computers. Includes ZX80.
Quizzes about authors. 16K.
TS 1000
Quizzes about poets and playwrights, modern authors. 16K.
TS 1000
Two role-playing adventure games. In Perilous Swamp, you must survive the monsters and rescue the princess. Escaping from Sorcerer’s Island is even harder. 16K.
TS 1000
Full controls, instrumentation and a view of the horizon. Use the radio beams and radio compass to navigate. Avoid hazards near the landing field. Promotes an understanding of air flight. 16K.
Downloadable TS 1000
Full controls, instrumentation and a view of the horizon. Use the radio beams and radio compass to navigate. Avoid hazards near the landing field. Promote an understanding of air flight. 16K.
TS 1000
Quizzes about towns and locations in Europe. 16K.
TS 1000
Quizzes about events in British history and monarchs. 16K.
TS 1000
Quizzes about inventions before and after 1850. 16K.
TS 1000
Use to replace broken or missing key or whole set. Not available directly from Sinclair; this was available from third-party vendors.
Quizzes about composers and musicians. 16K.
TS 1000
Contains keys and bare motherboard. Not available directly from Sinclair; this was available from third-party vendors.


Ring bound guide to Who’s Who at Sinclair was given to staff at the company. It gives profiles on the key staff complete with pictures. It was strictly available to staff only.


  • $99.95 Timex Sinclair 1000 microcomputer debuts
    Calling it a “mile-stone in the 125-year history of the Timex Corporation,” Timex introduced a $99.95 personal computer with 2k memory, which was developed by Sinclair Research and is essentially an upgrade of the Sinclair ZX81 micro. Further enhancements (to be available in the last quarter of this year) include a communications-interface devices and a
  • 16K RAM Approved; New Interface
    Federal Communications Commission (FCC) approved Sinclair’s 16K RAM for the U.S. market. C.A.I. Instruments has completed work on three interfaces.
  • 16K RAM Pack Schematic Corrections
    Corrections to problems with the 16K RAM pack schematic printed in SYNC 1:5.
  • 8K Basic ROM
    While the 4K Integer Basic in the Sinclair ZX80 is adequate for many applications, most programmers will eventually feel a hunger for more power. True, advanced functions can be simulated by way of subroutines, but such measures eat memory at an alarming rate. Enter the 8K Basic ROM. The chip costs a mere $39.95, which
  • 8K Basic ROM and 16K-Byte RAM Pack Specifications
  • 8K ROM Update
    Sinclair now has another source of 8K ROMs. According to Nigel Searle, the new manufacturer will deliver by September 1 enough ROMs to both replace bad ROMs and satisfy demand for new ones.
  • 8K ROM, 16K RAM Updates
    8K ROMs will arrive in late February. RAMs, no firm date.
  • A Brief Overview of the Chicago Consumer Electronics Show and National Computer Conference in Houston
    The Sinclair Spectrum was introduced in the US at the CES. TIMEX was actively promoting the $99.00 TIMEX/Sinclair computer.
  • A British computer hits it big
    In the consumer electronics industry, Clive Sinclair is known worldwide as a phenomenally creative inventor whose marketing fiascoes have more than once driven him to the brink of financial disaster. But one month after springing his latest product – a dirt-cheap personal computer called the ZX81 – on the U.S. market, the British entrepreneur finally
  • A piece of cake in Dundee
    Lynd Church goes to Scotland to discover just how the ZX-81 is manufactured. In keeping with its philosophy of sub-contracting all manufacturing processes, Sinclair Research appointed Timex to produce the ZX-81 when it was introduced in March 1, 1981.  Since that time, production at the Timex plant at Dundee has increased from 10,000 to 60,000
  • A Report on the Spectrum
    The Spectrum is a ZX81 that has been developed by adding a hi-resolution display, color board, improved cassette interface and larger keyboard.
  • American Express To Market Sinclair Research Computers
    Sinclair Research Ltd., the British personal computer maker said American Axpress will test market Sinclair’s $149.95 ZX-81 personal computer by mail this fall. A spokeswoman for American Express, which has a $140 million annual mail order business, says that if the test program is successful, the company will offer it to the 9.5 million U.S.
  • An Interview with Alfred Milgram
    Alfred Milgram, president of Melbourne House and David Ahl chat about the ZX80, Sinclair Research, and two new books.
  • Authorized Sinclair Repair Services
    MicroSync will take over Sinclair’s repair work for ZX80s and ZX81s.
  • Bankruptcy Filing for Cambridge North America
  • Betting is heavy - and we're not talking about Ascott
    Report from England about Sinclair and the BBC’s impending micro; Sinclair being passed over for the BBC micro and Sinclair’s confidence in the predicted success of the Spectrum.
  • Bits & Bytes
  • Bits & Bytes
  • Bits & Bytes
  • Bits & Bytes
  • Sinclair Research of U.K. to Unveil A Microcomputer: Weighing Less Than a Pound, It Will Cost $200 in U.S., Will Be Marketed Soon
  • Timex says it's leaving the home-computer market
    Timex joined the list of home-computer drop-outs with last month’s announcement that it plans to cease production and sales of the Timex/Sinclair 1500 and 2068 color computer. The company plans to continue manufacturing computers and peripherals for other companies.
  • U.K. Firm Bringing Out Small, Low-Priced Microcomputer
    A British electronics company, Sinclair Research, said it is bringing out a microcomputer that measures nine inches by seven inches by two inches thick at its maximum and weighs less than a pound. More important for many computer addicts, will be the machine’s price of about $220 in the U.S., where it will be marketed


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