, S!, S~, - Saluting another player, i.e. paying respect to him for a good fight/kill
TA - Training Arena: There you can practice, learn to fly or get help from a trainer
DA - Dueling Arena: Place to go for duels and setup fights
MA - Main Arena: where the fun, fight and whining is
SEA - Special Events Arena: for special events and snapshots
CT - Combat Theatre: Arena with historical maps and planesets
BackupMA - Mirror image of the MA a while ago. Dont know why ts still there, but its fun to fly there as well
chan200 - tune it if you like a good soap. Its an All channel read by every country (as long as a person tunes it) used for communication with 'enemies'
PM - private messaging ingame, ie tuning radio to a single player