[HangnJudge]

My First Calculator
Circa 1973
HP-45
Worked great for about 9 years...

[prismsinc]

I still own my father’s 2 HP-45’s, both still functioning!!!!

I also own an HP-41CX, and I have 2 HP-48’s as well!

[Mr Rogers]

That was a premium calculator! I had one around then that did basic +/-/*// functions and reciprocals...it cost $90.

[SteamShovel]

My dad got an HP-45 in the mid 1970's. He still has it.

I used an HP-48C in College, early 1980's. I still have it, but it is kind of bulky to travel with.

Recently I bought the only RPN calculator allowed for the PE exam. It's cheaply made compared to the original HP calcs.

But I can't stand not doing RPN. Parentheses are the pits.

[paulycy]

HP-45

My father, an electrical engineer, was never without his HP-45. This was the first calculator I remember really using, except for a 10 key with paper tape. And he always joked about reverse polish notation. Memories.

[EdReform]

In 1973, my boss wanted to get a new 45 to replace his 35. I bought his 35 for $125. I still have it and it still works.