I recently picked up a (working) HP 12c at a garage sale for $1 (saved $79!!). I also found out that it is a keystroke programmable calculator. I'm just wondering if anyone else here owns an HP 12c. If you do, please share your programs!  I'm also trying to learn/figure out how to program it...

It has a seven-segment display on it and 99 program steps. Have fun making a Gameboy emulator

By seven segment I mean the kind of normal displays on basic calculators where each character is split up into seven segments.
Looks like this

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Oh I see now what you mean Spyro. I wonder if any programmable calc that has multiple rows of characters ever used such type of display before?

I needed to create a account for omnimaga since, truely above post is so  jackassed.
You can manage a spaceshutle with calculator with such non graphing segment screen (although the 41 had more than 7-segments to allow alphabets): https://hpinspace.wordpress.com/2009/07/16/hp-41-series-and-the-space-shuttle-program/