My school's terminal machines are simply numbered, generally, but the different servers are named after Greek gods - Zeus, Athena, Apollo, Hestia, etc. A friend of mine has all his machines named for Norse gods - Heimdall, Loki, Odin... I don't have a system, and I haven't decided on names for most of my gear - my backup machine goes by "Dodecapede", the Inspiron 9400 is the "USS Round Rock", but I'm sorry to say that there's not much else of interest. Even the main machine just goes by "the monolith" since I moved it into an Antec 1200 chassis.

...and logically, Cats 5 and 6 would be very similar in appearance, but Cat 6 would end up able to chase mice ten times faster.