Comes with Manual on CD (PDf File), although you may not need it, it's very intuitive...
From the Manufacturer
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.
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
