Analog Arithmetic circuits???

Anyone have any layout's of some, or know where I can find some for reference? Trying to build a simple analog computer. I have a few scematics already, but I want to see more so I have an idea what else I might be able to implement. Just in case I run into a few situations where the one's I have will not workout properly. Ω

A google for "analogue computer opamp integrator" turned up a few links. The **broken link removed** looks quite good.

Mike.

Hmm, thank's. i never thought to phrase it that way. Well, that's what these forums are for.