A Router
A Point-to-Point link
A Protocol Gateway (Ether_II to Token Ring)
Any Destination for mail being forwarded to another.
the list would go on... but you get the drift.
Damn, Spice... Glen and a few others feel sorry for you.
Shoot, *Z* would fall under that... using mod_rewrite....
Hmmm, whole nuther direction to go... connection pooling devices, load balancing...
Storing things in a Database... think about it... it would also fall under it. Not being in original form.
Ouch, this one is gonna hurt.