Casio fx-140 calculator

The Casio company takes its name from its founder, Tadao Kashio, who established a small mechanical manufacturing business in Tokyo in 1946. During the early 1950s Kashio and his three brothers developed an electro-mechanical calculating machine based on telephone relay technology. The machine used over 300 relays and weighed 140kg, but was apparently quite successful. The Casio Computer Company was established in 1957 to develop and manufacture the relay-driven calculators.

10-digit scientific calculator with a fluorescent display
Made in Japan 1978
2 x AA batteries
Dimensions: 15.2 to 8 cm.

Kindly donated by Francis Hookham

Manufacturer: Texas Instruments
Date: 1978

Other Systems Related To Casio fx-140 calculator:

Item Manufacturer Date
TI-2500 Datamath calculator Texas Instruments 1972
TI SR-10 Electronic Sliderule Texas Instruments 1973
TI SR-10 Electronic Sliderule Texas Instruments 1973
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TI-2550 Memory Calculator (1st Design) Texas Instruments 1974
TI-2550 II Texas Instruments 1975
TI-SR-51A Version 1 Texas Instruments June 1975
TI-SR-51-II. Advanced professional electronic calculator Texas Instruments 1976
TI-56 Programmable Calculator Texas Instruments May 1976
TI-1650 Programmable Calculator Texas Instruments 1977
TI-58 Programmable Calculator Texas Instruments 1977
TI-30 Scientific Calculator Texas Instruments January 1977
Texas Instruments TI-59 Texas Instruments May 1977
TI-42 MBA Electronic Calculator Texas Instruments August 1977
TI-45 Scientific Calculator Texas Instruments 1978
TI-33 Electronic Calculator Texas Instruments 1978
TI 2550-IV TI-2550-IV Arithmetic Calculator Texas Instruments 1978
TI-58C Programmable Calculator Texas Instruments 1979
TI-35 Scientific Calculator Texas Instruments 1979
TI LCD Programmer 1981 Texas Instruments 1982
Little Professor 26-82-RC1 Texas Instruments 1985
TI-74 Basicalc Texas Instruments 1986
TI-5038 Paper Free Printer Texas Instruments 1988
TI-92 Graphing Calculator Texas Instruments 1995
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This exhibit has a reference ID of CH31350. Please quote this reference ID in any communication with the Centre for Computing History.


Casio fx-140 calculator

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