The TI-92 series are a line of graphing calculators produced by Texas Instruments. They include: the TI-92 (1995), the TI-92 II (1996), the TI-92 Plus (1998, 1999) and the Voyage 200 (2002). The design of these relatively large calculators includes a QWERTY keyboard.

Along with the TI-92 Plus and Voyage 200 it was one of TI's most sophisticated calculators, with such features as 3D graphing, upgradable flash ROM, built-in assembly language programming, and a generous amount of user-available memory.

The TI-92 Plus was available as both a standalone calculator and a module upgrade to the TI-92. It added additional memory, flash-upgradable ROM, and advanced mathematics software. A TI-92 Plus is functionally almost identical to a TI-89.

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The TI-92 is useful in a broad range of mathematics of mathematics from algebra through calculus including interactive geometry, computer algebra and statistics. The TI-92 graphs functions, parametric equations, polar equations and recursively defined sequences.

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Inexpensive hand held “super” calculators with built-in graphing software for enhancing mathematics teaching and learning are now 10 years old. Casio invented the first graphing calculator in 1985 and started a revolution in delivering powerful, computer aided graphing to now millions of mathematics students worldwide.

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