Sinclair Cambridge Electronic Pocket Calculator. This was one of a series of small calculators developed by British inventor, Sir Clive Sinclair (b.1940) in the early 1970s and the first that were designed to be small and light enough to fit in the pocket. It was sold both as a kit and fully built. Although it was expensive when it was first produced, its price soon dropped from £29.95 when first introduced in 1973 to below £15 in 1975. The Cambridge calculator was small, even by modern standards, weighing only 3.5oz (99g). It suffered from a design flaw; after a certain amount of use, it was impossible to turn off due to oxidation of cheap components used in the switch contacts.
- Science Museum, Mathematics: The Winton Gallery
- Computing & Data Processing
- Object Number:
- electronic calculators
- Sinclair Radionics Limited
- Permanent collection
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.