Ok.... so it's NOT a calculaotr, it's a computer. Knowing this, is it possible to control other things with it. (like realays, LEDS, motors, etc.) or does any one know any information about this, or where I could get further information. Also, where is the cheapest place to get a TI-85. I have an 81, and my 82 was stolen, so i think i'll get an 85 instead of another 82. Thanks in advance! -Colin