Vintage Texas Instruments TI-81 Graphic Calculator / Free Shipping

Texas Instruments TI-81 Graphic Calculator Features: •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