An engineering student would be screwed without a decent calculator. So far it's been good enough for anything I need it to do. The storage is good for cheat sheets that you're not supposed to have and it knows 2+2 is 4 and has a lot of advanced stuff on it. Most of it I've never used but the matrix functions are always helpful.
Texas Instruments - TI 83 is recommended by BillSanchez3
Size Handheld
Calculator Type Graphic
Print Option Without Print Option
Other Functions
Display Large
Power Source Battery
Currency Exchange Function Without Currency Exchange
Key Size Regular
Case Included With Case
Adapter Included Without Adapter
Digit Display 128 Digit
AC Connectivity Without AC Connectivity