I had an HP48, I had lots of fun with Bjorn Gahm's IR remote control which could mimic the remote control signals of most common television brands, including th

I had an HP48, I had lots of fun with Bjorn Gahm's IR remote control which could mimic the remote control signals of most common television brands, including the ones at my high school. The HP48 also had the ability to set an alarm to execute an arbitrary piece of code, e.g. turning on the TV to some channel and turning the volume up to max at some predefined time the middle of class. Teachers were completely stumped. Their initial suspicions were always that someone brought a universal remote control to class, but they would painstakingly search everyone's desks to find nothing. And then after asking everyone to put their hands up in the ai, the TV would still have a mind of its own. Yeah, your TI-89 was no fun.