Texas Instruments TI-81  
Written by Accutron on 2015-06-15  

In 1990, Texas Instruments introduced the TI-81, a virtual clone of the Casio FX-7000G released five years earlier, and instantly seized almost the entire high school and college graphing calculator market. Casio would respond to the TI-81 with the improved FX-7700G two years later, but would never regain its pioneering lead in graphing calculators. To this day, Casio and TI still build graphing calculators based on the architecture of the FX-7000G and TI-81, and TI still enjoys a comfortable dominance over Casio in the student scientific calculator market.

Texas Instruments TI-81 graphing calculator.

TI-81 calculator in original packaging.

This article is part of the [Electronic Calculators] exhibit.

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