I took the AP Calculus AB test last May, and on it they had the rules... Don't clear memory, no QWERTY (92) calcs., AND FOR IR CALCS, an official piece of electrical? tape must be in place over the IR port. There are probably similar rules for other tests. It might be in the fine print if you pressed the issue, taking the PSAT and SAT tests. -Larry Currie Larry1492@juno.com