Casio Casio FX-991CW Classwiz Adv Scientific Calculator Dual Power FX-991CW-W-UT
Casio FX-991CW-W-UT Casio FX-991CW Classwiz Adv Scientific Calculator Dual Power. TheNew Casio ClassWiz has arrived. TheCasio fx-991 CW is the new upgraded version of the Casio fx-991 EX (Casio's most advanced scientific calculator).