The NumWorks graphing calculator

When I was in high school I took the advanced stream of mathematics we were given the option (via a mail order form - this was back in the 90's) to order a TI graphical calculator at a discounted 'student price' my parents grumbled about the price a little and then allowed me to purchase it. I used it all through high school it was handy but I don't think anything spectacular nor did it give me any edge over students who opted not to order one. I can remember programming pong on it using the built in basic language (following instructions I found online) so maybe it did help me get into programming.

At university I found out about 10 minutes before my first exam all forms of programmable calculators were banned from examinations I rushed off and bought a cheap $10 Casio scientific calculator and (barely) made it back in time for the start of the exam. I used that Casio for the entirety of my Engineering degree - still have it. No idea what happened to my Graphical calculator.