I'm pretty young (sorry, not going to tell age due to many stereotypes people seem to form when I DO tell them
my age), but for my age I know LOTS (more than my Computers Technology teacher at least).  My specialties are:

FTPs
IRC
Webpages (WWW)
Miscellaneous applications and utilities (try and see if there's one I don't have :)
CD-R and CD-RW software and production...which is where I get my income from
Games - Knowledge of many sites that have games and their cracks, hacks, and cheats.
Random Internet (except for AOL because of its suckiness)
Warez (especially good at this)
Technical Internet problems