Bought this to use on some exams where programable calculators aren't allowed. While this is no ti-89, this will pretty much do everything a ti-83 /84 does without graphing. Has a ton of very useful built in converters and solvers. I find myself using this in my Dynamics and Mechanics classes more than my graphing calculator because of how easy it is to use. Got two of my friends to get 'em too, and they both love them.