Clive Sinclair is a British electronics genius. He founded his company in the early 1960s and introduced very innovative micro radios and audio equipment. In 1972 he amazed the world with the Sinclair Executive calculator which
was only 9mm (0.4") thick and ran off button cells. A range of calculators followed, but Sinclair left the calculator business in 1979 to concentrate on other products, such as the home computers and micro-televisions. See the
article "Clive Sinclair and the Pocket calculator" in the Collecting Calculators section of this site.
For details of most other Sinclair calculators go to the Sinclair section on this site.
Examples of Sinclair calculators