Most Treasured HP Collectible

[KF6GPE]

My dad's HP42S. He bought it when he started his business, and I wrote a bunch of programs for him --- he'd had an HP-41CV at his last job, but was more comfortable using other people's programs. It's on my desk at work, and gets used every day.

I've got lots of other toys --- err, HP calculators --- but I have a lot of sentimental value invested in this one.