What is a closed system? I know open source software (Such as Linux) let's you edit the source code. Would the cx cas be good or should i go with the 89?
HI y'all! I was just told by my programming teacher that I need a new graphing calculator. She told me to decide between the TI 89, Casio Classpad fx-cp400 (or fx cp500) or the TI-Nspire CX C.A.S. I don't know if greyscale or color matters though in the long run. I am a programmer and need...