The Hewlett Packard 11-C

Display: LCD, 10 character display

Power: 3 SR44 watch batteries

Adv. Functions: Trig, hyperbolics, logs, statistics, random number generator

Memories: 21

Programming: 203 merged program steps (memory registers can be converted into program space), goto, conditional branching, subroutines, flags, labels.

Comments: This particular unit has had a hard life by the looks of it. It was given to me as a "broken" calculator (you can see someone has scratched the word "BAD" into the bezel), but it just needed a little help. Of late, this has become the one I keep with me in part because of its small size, long battery life, and capabilities. Also, because a few more scratches are going to matter!