I am using to machines (PCs) with 2 keyboards and 2 mouses. Is there a way to have only one mouse and a key board as I have to software to be used at one time?

I am using to machines (PCs) with 2 keyboards and 2 mouses. Is there a way to have only one mouse and a key board as i have to software to be used at one time?
Don't think there's any, if there is 'll be surprise and happy to know.

A KVM (keyboard, video, mouse) switch could be used to switch control between two PC's using one mouse and keyboard (and monitor if you so desired). Something like this for standard PS2 connections: http://www.newegg.com/Product/Product.asp?Item=N82E16817394009
And something like this for USB connections:http://www.newegg.com/Product/Product.asp?Item=N82E16817403047

Also, there are software solutions you can use. Here's some examples:
http://synergy2.sourceforge.net/
http://www.kavoom.biz/
http://www.maxivista.com/kvm.htm

Good luck!