Railways has established stations for the codes they use elsewhere.
WL Warangal SC R *Railway_Wait List
SF Settigunta SC R *Railway_Super Fast
RSA Risama SEC R *Railway_Rake Sharing Arrangement
ROB Robertson SEC R *Railway_Railway Over Bridge
RMS Ramshai NF...
more... R *Railway_Railway Mail Service
LP Lalapet S R *Railway_Loco Pilot
GRP Gangpur E R *Railway_Govt Railway Police
GR Gulbarga C R *Railway_Goods Receipt
DEMU Demu EC R *Railway_DEMU=TrainType
CNF Chianki EC R *Railway_Confirmed Ticket
CRS Chaurashi SE R *Railway_Chief Reservation Supervisor
ASM Asarma W R *Railway_Astt Station Master