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Texas Instruments TI-55 II (TI-55-II)

Texas Instruments TI-55 II
Image: Mark Bollman, used with permission

The Texas Instruments TI-55 II is a programmable calculator with 8 digits precision and algebraic logic. It has 80 functions, 45 keys, and an LCD (liquid crystal) display. The power source is 2xLR44. The calculator was manufactured in Taiwan.

Facts at a glance:

FeatureValue
TypeProgrammable
Functions80
Keys45
Precision8
LogicAlgebraic
Display typeLCD
Length147mm
Width76mm
Thickness17mm
Power Source2xLR44
CountryTaiwan
Year introduced1981
Year discontinued1984

Replacements:

If you have a Texas Instruments TI-55 II that is no longer working, you can first try replacing the 2xLR44 batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Texas Instruments