What is the oldest electronic you own?

You should throw it a quinceanera. Put it in a dress and buy it a small car.

I have a few, but the one that immediately came to mind is my HP16c calculator.

I still use my 2011 MacBook Pro! He’s got a SSD and 16GB RAM now, but he still works perfectly—and on original battery, lasts for over three hours! (Originally got him for LAN parties, and always used him plugged in. I believe 40-ish charge cycles.)