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References | Page 3 | Smithsonian Institution
![TI's first graphing calculator, the TI-81] - Texas Instruments Records - SMU Digital Collections](https://digitalcollections.smu.edu/digital/api/singleitem/image/tir/4/default.jpg "TI's first graphing calculator, the TI-81] - Texas Instruments Records - SMU Digital Collections")
TI's first graphing calculator, the TI-81] - Texas Instruments Records - SMU Digital Collections
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TI-81 - Statistics - Mean - YouTube
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File:TI-81.png - Wikimedia Commons
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TI-81 - Texas Instruments' first graphing calculator - YouTube
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The TI-81 Is The Best Graphing Calculator For the Money--But It Doesn't Play Doom!: E9/R8 - YouTube
TI-81 - ticalc.org
TI-81 - Wikipedia
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