Very small computer!

http://www.picotux.com/techdatae.html

This Linux computer is fully functional with 55 MHz. While this may seem slow, its really not that bad. You could do alot with 5 MHz. Many of the standard features like Word, and 3d programs can be ran on this computer. The funny thing is the power block... it is larger than the computer... might as well plug it in then.