Electronics Ltd. In 1989, Thandar Electronics Ltd merged with Thurlby Electronics Ltd, forming Thurlby Thandar Instruments Ltd. This company now does business under the name Aim and Thurlby Thandar Instruments (Aim-TTi). Sinclair Instrument and Science of Cambridge When it became clear that Radionics was failing, Clive Sinclair took steps to ensure that he would be able to continue to pursue his commercial goals: in February 1975, he changed the name of Ablesdeal Ltd. (an off-the-shelf company he bought in September 1973, for just such an eventuality) to Westminster Mail Order Ltd.; this was changed to Sinclair Instrument Ltd. in August 1975. Finding it inconvenient to share control after the NEB became involved in Radionics, Sinclair encouraged Chris Curry, who had been working for Radionics since 1966, to leave and get Sinclair Instrument up and running. Sinclair Instrument developed the "Wrist Calculator" to generate cash, which soon became a commercial success selling in surprising figures. In July 1977 Sinclair Instrument Ltd was renamed to Science of Cambridge Ltd. Around about the same time Ian Williamson showed Chris Curry a prototype microcomputer based around a National Semiconductor SC/MP microprocessor and some parts taken from an earlier Sinclair calculator. This was sold as the MK14 microcomputer kit. Science of Cambridge ultimately became Sinclair Research Ltd. Notes References Sinclair: A Corporate History Nigel Tout. Clive Sinclair and the Pocket Calculator, 2003. External links Aim and Thurlby Thandar Instruments (successor to Thandar Electronics Ltd and Thurlby Thandar Instruments Limited). Electronic calculator companies Manufacturing companies of England Companies based in Cambridge Electronics companies established in 1961 Manufacturing companies established in 1961 1961 establishments in England