FREE: Scientific Graphing Calculator TI-81 *BACK TO SCHOOL*

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Pre owned Texas Instrments Scientific Graphing Calculator. Photos show how screen looks when on. Screen seems light. Don't know how to make screen darker. Everything works fine.

The Texas Instruments TI-81 is a 16-digit graphic calculator, featuring simple menu displays to aid in fast use of advanced functions. This Texas Instruments graphic calculator can save up to 37 programs in memory for later use. With an 8-line by 16-character display. Users can quickly locate keys for editing, graphing, scientific calculations, and advanced function usage. The Texas Instruments TI-81 can graph four functions at once, making complex equations easier to tackle. This Texas Instruments graphic calculator can save multiple calculations for later use.