I'm working on a system...
... connected by a serial console to another computer...
... which I'm accessing via Remote Desktop...
... from another Windows system...
... which I'm connected to via WebEx...
... from another Windows system...
... which is a virtual computer hosted on a different system...
... that I'm accessing via VMWare Console...
... from a Windows computer...
... that's itself a VMWare system...
... running on my Mac...
... accessing the keyboard and mouse via Synergy...
... from my Linux box...
... which is, actually, a real computer, with a keyboard and mouse attached to it.