What are the specifications of the computers?

This seems like a pretty weird thing to omit from the wiki, considering that these are required to understand how much the computer can handle.

The "computers" are all coroutines running within a single Lua VM, using co-operative multitasking. Their processor power and memory capacity has no defined limit, but rather is whatever the system handling your Minecraft server can provide. Every additional computer or turtle you start up cuts into that shared pool of resources. The only real limitation is in terms of disk space - each system gets a manufacturer's meg apiece, by default.

So basically a bank of ComputerCraft systems is roughly as powerful as a single ComputerCraft system.

Usesless trivia, some people joke on the forums that the computers run on redstone chips, in reference to their crafting recipe.