What's the smallest device I can program on?

Question

I'm thinking of something smaller than a laptop that i can spend my hours on the way to work doing project euler problems or such.

Any ideas?

Answer 1

If you mean a programming platform, you could get a netbook like the ASUS EEE.

Or if you meant smallest programmable device, check out a PIC microcontroller:

http://en.wikipedia.org/wiki/PIC_microcontroller