Clever design of its electronics to reduce the power consumption allowed the use of button cells for the first time in a hand-held calculator, and gave a very thin design which was remarkable for the time.
Photograph taken by myself of a calculator in my collection.
2007-05-28 15:05 MaltaGC 587×1000×8 (48400 bytes) Sinclair Executive calculator. Clever design of its electronics to reduce the power consumption allowed the use of button cells for the first time in a hand-held calculator, and giving a very thin design which was remarkable for the time. Photograph tak
{{Information |Description=Sinclair Executive calculator. Clever design of its electronics to reduce the power consumption allowed the use of button cells for the first time in a hand-held calculator, and gave a very thin design which was remarkable for