> > It stands for Texas Instrument, the brand of graphing calculator I'm referring to. The numbers are the models.
>
> I prefer the Ti-85 but I've seen the new ones...either called 89 or 92, can't remember....and they are quite nice.

'Course, they all cost an arm and a leg. Not to mention your firstborn. And it's really a drag when you've already bought one and your math teacher tells you you need a different model. :(