This was posted in the FFXIV Discussion thread by me, but has the potential to get lost and I consider it rather important so:
PGL = Pugilist
GLA = Gladiator
EXC = Marauder (Mistranslation)
FNC = Fencer (Uses a Rapier)
ENF = Enforcer (Uses a Mace)
ARC = Archer
LNC = Lancer
MSK = Musketeer (Uses a Gun)
MYS = Mystic (Uses a Mystic Weapon)
THM = Thaumaturge
CON = Conjurer
ACN = Archanist (Uses an Archanist Weapon)
WDK = Woodworker
BSM = Blacksmith
ARM = Armorer
GLD = Goldsmith
WVR = Weaver
ALC = Alchemist
CUL = Culinarian
HRV = Harvester
FSH = Fisher
SHP = Shepherd
??? = Tanner
??? = Botanist
??? = Miner
??? = Marauder
Pink are new and confirmed to exist, Green seem to be missing from the list.