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Busicom 100DA

Busicom 120DA

Busicom 100DA.

Display is 10 digits, amber gas-discharge.

AC power supply.


Integrated circuit - Texas Instruments TMS0106NC, here date coded to mid-1972.

185 x 238 x 65 mm. (7.3" x 9.4" x 2.5").

Made in Japan, by Nippon Calculating Machine Corp. (aka Busicom).

This calculator was made by the Japanese Busicom company before it went out of business.


Inside, showing the gas-discharge display, the Texas Instruments integrated circuit, and some of the 32 transistors.


Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2019  except where noted otherwise.