Texas Instruments TI-30.
Distinctive features: A popular, low-cost model.
Technical details:
Display is 8 digits, red LED.
Four function, memory, scientific functions.
Integrated circuit - Texas Instruments TMC0981.
9v (PP3 battery).
78 x 146 x 35 mm (4.0" x 6.25" x 1.25").
Made in various countries including USA and Italy.
Texas Instruments started research into portable calculators in 1966 with the "Caltech" project, and went on to supply calculator electronics components to many companies. In 1972 it started to market it own calculator, the TI-2500 Datamath, which was the first of many models.
By 1977 it was possible to include scientific functions and memory in a basic calculator, all based on a single LSI integrated circuit. The TI-30 was among the most popular of all LED calculators and was manufactured into the 1980s. The cost in 1977 was US$24.95 [about £14.60 GBP].
Texas Instruments is one of the few early manufacturers which is still in the calculator market.
Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2025.
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