[95014_refugee]

Then the next question is; what would you do with it?

You need a source of problems to solve, and until you've bootstrapped the rest of society at least to the point where something like high-resolution trigonometric tables, desktop publishing, high-speed accounting, (for example) are needed, the effort isn't going to keep you fed...

[kjs3]

Calculate ballistics, like some of the original computers were created for? Never too early post-apocolypse to start the thinking about the next war.

[tyingq]

I agree it wouldn't be high on the list, but I also imagine there would be practical needs. Like command/control. So, voice only radios first, but some sort of messaging that doesn't need a live listener on the radio would then be a nice next step. And that could be done with a simple computer.