Pleb. Who buys a TI-83 when, for just 300 more dollars, you can be future proofed, and buy an Hp-48gx!
tactile key bump!
RPN! "2 2 +" bitches!
IR transmitter and receiver. You could turn it into a tv remote.
expansion slots for more ram, or for specialized libraries of equations!
You too can make your college math professor shrug his shoulders. "i'm sure it can do X, but I don't know how to help you make it do it, so you're either on your own, or you go buy a TI like the rest of your classmates".