Speak English, man.
That's not hip... it's stupid.
TOS - The Original Series
I thought all Trekkies knew that acronym!
TOS = The Original Series
TNG = The Next Generation
DS9 = Deep Space Nine
not sure about Voyager....maybe VGR
not sure about Enterprise...maybe ENT
TAS = The Animated Series
TOS: the original series
TNG: the next generation
TOS is the opposite of TNG which TAS was not WOK. DS9 and ENT were OK, SFS sucked, GEN was boring but FCT was amazing.