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A Graphing Calculator Manual for Finite Mathematics: With Text, Examples, and Exercises for the TI-82 (including procedures for the TI-81/85 and the CASIO 7700G): Seaver, Robert E: 9780534935184: Amazon.com: Books
TI-80 - Wikipedia
TI's first graphing calculator, the TI-81] - Texas Instruments Records - SMU Digital Collections
Texas Instruments TI-81 Graphing Calculator Manual Original Box Used Once 33317073122 | eBay