HP48GX was the best calculator ever. I used one throughout my middle/high school. The best features, IMO, were (0) the IR emitter and (1) the ability to progra

HP48GX was the best calculator ever. I used one throughout my middle/high school. The best features, IMO, were (0) the IR emitter and (1) the ability to program it to switch ON at a specified time and run code. This means I could hide my calculator somewhere in a room before class started and program it to turn on halfway through class, turn the classroom TV on, turn the volume to max, and start wildly flipping to random channels. One teacher had all of us students put our hands up and walked around the room looking for who had a remote at their desk, and I remember watching that teacher's face of horror when the TV continued flipping channels as everyone had their hands up.