I've got 2 CE's (one black one which broke, and my "signature" mint CE) and a Casio fx 115es PLUS (scientific) and a four-function (Casio SL-300SV, bought for AP Bio)
ProgrammerNerd: The abacus was a good one (I have one too ) but the second?! If you actually have one in your basement, that would be cool!
ProgrammerNerd: The abacus was a good one (I have one too ) but the second?! If you actually have one in your basement, that would be cool!