For Sale: Texas Instruments TI-81 Graphics Calculator

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For Sale: Texas Instruments TI-81 Graphics Calculator

This is a great graphics calculator for any high school or university student.
Here are a few specs listed on the box:


-You can view entire expressions as they are entered on the large 8x16
 character display as well as see the calculated results.
-define, save, and graph up to four functions at one time.
-up to 3 parametric equations (X and Y components expressed in terms of T) can
 be saved, graphed, and analyzed using all of the trace and zoom features
-perform one- and two-variable statistical analyses, both numerically and
 graphically
-pull down menus permit logical grouping of and easy access to advanced
 functions without adding keyboard clutter.
-just one keypress automatically plots selected functions in the viewing
 rectangle
-several built-in zoom functions to change graph viewport range.
-up to 3 matricies, each with a dimension of up to 6x6 can be entered, edited,
 and manipulated.
-up to 37 programs totalling 2400 bytes
-up to 27 different variables can be stored
-all variables are saved while the unit is off.
-includes a comprehensive guidebook outlining all features
-durable slide-on cover to protect the screen and buttons.


This calculator is in perfect condition, used with care, and includes original
box, manual, slide-on cover, and batteries. I want $65 CDN or $48 US for this
unit, OBO. Let me know if you're interested. More info can be found at
www.ti.com


Thanks,


Kris Wilk
905-820-8378
Mississauga, Ontario, Canada