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TI-2550 Memory Calculator (1st Design)

Size (approx):
80mm (max) x 164mm x 45mm (max)  (w,h,d)
Weight 212g excluding batteries.
Power: 6.0V DC, 4 x AA size batteries or 3 x AA-size rechargeable batteries.
Battery compartment has rotary lock turned with a coin.  On/off switch on front at the far top right corner.
Display: 8 digit red LED display - ninth used for minus, error and memory signs.
Features: Basic four function with percentages and four function memory.  Switch for floating, two or four decimal points.
Date: 1974

Functions: Basic four, memory, percent
Number of Digits: 8
Display Type: LED
Logic Technology: LSI
IC Complement: Texas Instruments TMS 0601 NC (5 total)
Manufacturer: Made by Texas Instruments in Italy

Kindly dontaed by Francis Hookham

Manufacturer: Texas Instruments
Date: 1974

Other Systems Related To TI-2550 Memory Calculator (1st Design):

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
TI-SR-50 scientific pocket calculator Texas Instruments 1973
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
Casio fx-140 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
TI-Nspire Graphing Calculator Texas Instruments July 2008

This exhibit has a reference ID of CH31295. Please quote this reference ID in any communication with the Centre for Computing History.


TI-2550 Memory Calculator (1st Design)

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