Are you allowed to use more than one calculator on the PSAT/SAT?

a href="http://www.collegeboard.com/student/testing/psat/about/calculator.html" rel="nofollow"http://www.collegeboard.com/student/test…/a tells what types of calculators can be used on the PSAT. The TI-89 and TI-89 Titanium are the most advanced ones that CAN be used on the PSAT; the TI-92 can NOT be used on the PSAT because it has a QWERTY keyboard. Other tests differ - the TI-89/TI-89 Titanium may NOT be used on the ACT.