TI-2550 II

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Texas Instruments (also known by its initials: TI), is a US company with its headquarters in Dallas, Texas. It is primarily a manufacturer of semiconductor components, particularly integrated circuits, and defence systems.


TI developed the first calculator integrated circuit (or "chip") and developed a prototype pocket calculator called the Cal-Tech in 1967. In reality the Cal-Tech was too bulky to be pocketable but it achieved its objective, which was to create a market for the ICs among technology companies marketing calculators such as Bowmar and Craig. TI has a patent for the pocket calculator.


Sometime later in 1972 TI became a calculator manufacturer itself with the TI-2500 Datamath. The TI-30, in its various incarnations, is one of the most popular scientific calculators, and it has become one of the main manufacturers of graphing calculators with its TI-8x line. TI graphing calculators have become the standard in US schools, and have resulted in a community of developers of simple BASIC programs for these devices. In addition, some models allow lower level programs to be developed in an assembly-style programming language.

The Texas Instruments TI-2550 II is an arithmetic calculator with 8 digits precision and algebraic logic. It has 9 functions, 27 keys and a VFD (vacuum fluorescent) display. The power source is 2xAA sealed. The calculator was manufactured in Italy; USA.

Type Arithmetic
Functions 9
Keys 27
Logic Algebraic
Display type VFD
Display size
Length 147 mm
Width 81 mm
Thickness 32 mm
Power Source 2xAA sealed
Year introduced 1975
Year discontinued 1976

Kindly dontaed by  Francis Hookham

Manufacturer: Texas Instruments
Date: 1975

Other Systems Related To TI-2550 II:

Item Manufacturer Date
TI Europa 10 Texas Instruments Unknown
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 Memory Calculator (1st Design) Texas Instruments 1974
TI-2500 B Datamath calculator Texas Instruments 1974
TI-SR-51A Version 1 Texas Instruments June 1975
TI-SR-51-II. Advanced professional electronic calculator Texas Instruments 1976
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TI-1650 Programmable Calculator Texas Instruments 1977
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TI-57 Programmable Calculator 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 1985
TI-5038 Paper Free Printer Texas Instruments 1988
TI-81 Programmable Calculator Texas Instruments 1990
TI-92 Graphing Calculator Texas Instruments 1995
TI-Nspire Graphing Calculator Texas Instruments July 2008

This exhibit has a reference ID of CH31230. Please quote this reference ID in any communication with the Centre for Computing History.


TI-2550 II

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