Oh, we had one approved graphing calculator - well, two. The Casio FX-7700 and its big brother, the FX-9700. Problem solved. Except if you happened to prefer R

Oh, we had one approved graphing calculator - well, two. The Casio FX-7700 and its big brother, the FX-9700. Problem solved. Except if you happened to prefer RPN; I had a HP-48 which I had bought prior to the edict naming The One True Calculator - the day I enrolled at university, I started using it again, only to be met with a similar edict in my second term, naming the Ti-89 the only kosher graphing calculator. Since I graduated, the HP-48 has been in daily use.