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  2. Casio FX-502P series - Wikipedia

    en.wikipedia.org/wiki/Casio_FX-502P_series

    The FX-501P and FX-502P were programmable calculators, manufactured by Casio from 1978/1979. [citation needed] They were the predecessors of the FX-601P and FX-602P.It is likely that the FX-501P/502P were the first LCD programmable calculators to be produced as up until 1979 (and the introduction of the HP-41C) no manufacturer had introduced such a device.

  3. Sinclair Executive - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Executive

    The Sinclair Executive was the world's first "slimline" pocket calculator, and the first to be produced by Clive Sinclair's company Sinclair Radionics.Introduced in 1972, the calculator was produced in at least two versions with different keyboard markings; a variant called the Sinclair Executive Memory was introduced in 1973.

  4. Sinclair Scientific - Wikipedia

    en.wikipedia.org/wiki/Sinclair_Scientific

    The Sinclair Scientific was a 12-function, pocket-sized scientific calculator introduced in 1974, dramatically undercutting in price other calculators available at the time. The Sinclair Scientific Programmable , released a year later, was advertised as the first budget programmable calculator.

  5. Victor Technology - Wikipedia

    en.wikipedia.org/wiki/Victor_Technology

    1200-4 - The 1200-4 is a black professional desktop calculator with a 12-digit tilted LCD display and is made out of 50% recycled plastic. It has an autoreplay feature which enter, check and correct up to 99 entries and cost/sell/margin keys and 2 independent tax keys.

  6. TI-59 / TI-58 - Wikipedia

    en.wikipedia.org/wiki/TI-59_/_TI-58

    The TI-59 is an early programmable calculator, that was manufactured by Texas Instruments from 1977. It is the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and adding "ROM Program Modules" (an insertable ROM chip, capable of holding 5000 program steps).

  7. Fuller calculator - Wikipedia

    en.wikipedia.org/wiki/Fuller_calculator

    The calculator was sold in a hinged mahogany case 46 by 12 by 11 centimetres (18.1 in × 4.7 in × 4.3 in) which, if required, holds the instrument when in use by means a brass support that can be latched to the outer end of the case. [6] [7] Out of its case the calculator weighs about 900 grams (32 oz). [8]

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