Why not make a list?
Ones I've heard:
EB = Empire Builder
CS = Coast Starlight
OBS = On Board Staff/Service
CZ = California Zephyr
CNOL = City of New Orleans
AE = Acela Express
AT = Auto rain
ACS = Atlantic Coast Service
CL = Capitol Limited
LSL = Lake Shore Limited
SWC or SC = SouthWest Chief
SL = Sunset Limited
CCC = Cross Country Cafe
SSL = SightSeer Lounge
DL = DinerLight/Lounge (same as CCC)
AMTK = Amtrak
CTA = Chicago Transit Authority
NYCTA = New York City Transit Authority
NJT = New Jersey Transit
MTA = Metropolitan Transit Authority
LIRR = Long Island Rail Road
MBTA = Mass. Bay Transit Authority
EB = East Bound (is often confused with the Empire Builder)
WB = West Bound
NB = North Bound
SB = South Bound
These are ones I may have made up or may be used:
SJ = San Joaquin
CC = Capitol Corridor
HF = Hearland Flyer
BW = Blue Water
NER = NorthEast Regional
DE = DownEaster
ML = Maple Leaf
SM = Silver Meteor
SS = Silver Star
HS = Hoosier State
PM = Pere Marquette
PS or PSL = Pacific Surfliner
IS = Ilini-Saluki
HIA = Hiawatha
ES = Empire Service
LS = Lincoln Service
RR = River Runner
IZ = Illinois Zephyr
TB = Thruway Bus
BR = BedRoom
RM = RooMette
FB or FBR = Family BR
AB or ABR = Accessible BR
BC = Business Class
FC = First Class
ML = Metropolitan Lounge
CA = Club Acela
Then of course there are the city codes; these can be found out here:
http://www.amtrak.co...stations_A.html
And I'm sure there are many many more.
peter