Posts about Math RSS feed 2021-10-31 17:55Disassembling HP-97 program cards 2021-10-24 14:20Reading program cards on the HP-97 2021-10-20 16:12Beginning the Repair and Refurbishment of an HP97 Programmable Calculator 2014-09-08 15:49Laser water cooling, part 1: Peltier element theory