Keith Palmer's Multi-Purpose Journal

I do have my mother's high school slide rule with me. It's a simple model, with only C, D, CI, A, B, L, and K scales, and all on one side only (with instructions and conversion factors printed on the other side). While I was looking up the calculator simulators, though, I did notice there are also "slide rules for the iPhone"; you have to scroll back and forth to see all of the rule, however.