I vividly recall my first HP Pocket Calculator with Reverse Polish Notation I had during my undergraduate studies:

@pj I remember my Dad brought his home to show the family. He was so excited. I was like so now I don't have to learn this slide rule thing anymore, right? Nope wrong, he wouldn't even let me touch it.

@pj I got a (fantastically expensive) HP45 for high school graduation. Better than getting a car!

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