The Texas Instruments 81 Graphing Calculator is a handheld device powered by batteries. It features a regular-sized key and is specifically designed for graphing calculations. As part of Texas Instruments' line of calculators, this model is compact and convenient for use in various office and industrial settings. With its advanced functions and capabilities, the Texas Instruments 81 Graphing Calculator is a reliable tool for solving complex mathematical equations and creating graphs with ease.
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