Texas Instruments TI-81 Plus Graphing Calculator - Used Item IN STOCK and in good condition. All items have been previously used, but have been fully tested and include a 90 day exchange warranty. Items ship with all needed software and accessories. Since this is a used Item, it may show some minor signs of use but should not affect performance. Manuals can be downloaded below.
Product Details - Designed for ease of use, the keys of the TI-81 are grouped by color and physical layout to allow easy location of the key you need. The keys are divided into four zones: graphing keys, editing keys, advanced function keys, and scientific calculator keys.
•8-line by 16-character display
•Defines, saves, and graphs up to four functions and three parametric equations
•Enter, save, and manipulate up to three 6x6 matrices
•Advanced functions accessed through easy-to-use display menus
•One- and two-variable list-based statistics
•Saves up to 37 programs in its 2.4K bytes of memory
•Slide case included