| AC | Air-Conditioned | 
            
              | ACC | Air-Conditioned coach or class | 
            
              | ACCC | Air-Conditioned Chair Car | 
            
              | ACP | Alarm Chain Pulling(!) | 
            
              | ADE, ADEN | Assistant Divisional Engineer | 
            
              | ADEE | Assistant Divisional Electrical Engineer | 
            
              | ADME | Assistant Divisional Mechanical Engineer | 
            
              | AE, AEN | Assistant Engineer (see also Technical terms above) | 
            
              | AEC | Accident Enquiry Committee | 
            
              | ALK | Allowance in Lieu of Kilometrage (in calculating payments for loco pilots/drivers) | 
            
              | ARMV | Accident Relief Medical Van | 
            
              | ART | Accident Relief Train | 
            
              | ARTS | Advanced Railway Ticketing System | 
            
              | ASM | Assistant Station Master | 
            
              | AW | Auxiliary Watering (in working timetables) | 
            
              | AWS | Auxiliary Warning System | 
            
              | BESA | British Engineering Standards Association | 
            
              | BG | Broad Gauge | 
            
              | BIO-TOIL | 'Biological Toilet' - eco-friendly toilet with bacterial decomposition facility developed by ICF for use on railway coaches. | 
            
              | B/L | Branch Line | 
            
              | BOLT | Build-Own-Lease-Transfer: private ownership/operation scheme for various freight & passenger services and infrastructure. | 
            
              | BPS | Blue Parcel Service | 
            
              | CA&FO | Chief Accounting and Finance Officer | 
            
              | CARS | Central Accounting and Reporting System (consolidated reports of ARTS ticketing during the day) | 
            
              | CBO | City Booking Office | 
            
              | CC | Chair Car | 
            
              | CCS | Chief Commercial Superintendent | 
            
              | CCTV | Closed-Circuit TV | 
            
              | CEE | Chief Electrical Engineer | 
            
              | CFTS | Chief Freight Traffic Superintendent | 
            
              | CFS | Container Freight Station | 
            
              | CHA | Custom House Agent | 
            
              | CME | Chief Mechanical Engineer | 
            
              | COIS | Coaching Operations Information System | 
            
              | Conc. | Concessional fare (annotation on ticket) | 
            
              | CARTRAC | (not really an acronym) CONCOR's automobile transport service | 
            
              | CONCERT | COuntrywide Network of Computerised Enhanced Reservation and Ticketing | 
            
              | CONTRACK | (not really an acronym) CONCOR's container freight service | 
            
              | COW | Career On Wheels: informal classrooms for teaching English, etc., on board trains | 
            
              | CRS | Chief Reservations Supervisor, Computerised Reservation System Commissioner of Rail Safety | 
            
              | CT | Control Tower | 
            
              | CTI | Central Training Institute | 
            
              | CTR | Combined Train Report | 
            
              | CTU | Centralized Training Unit | 
            
              | CVM | Coupon Validating Machine (for ticketing with prepaid coupons) | 
            
              | C&W | Carriage & Wagon (staff for plumbing, electricals, amenities) | 
            
              | CW | Carriage Watering facilities (in working timetables) | 
            
              | DAL | Delhi Avoiding Line, a route for goods trains to avoid the central New Delhi area. | 
            
              | DCT | Domestic Container Terminal (as opposed to the ones equipped for international freight) | 
            
              | DEE | Divisional Electrical Engineer (Sr. DEE = Senior Divisional Electrical Engineer) | 
            
              | DF | Development Fund | 
            
              | DFC | Dedicated Freight Corridor | 
            
              | DF | Defence quota | 
            
              | DME | Divisional Mechanical Engineer | 
            
              | DP | Duty Pass | 
            
              | DRF | Depreciation Reserve Fund | 
            
              | DRM | Divisional Railway Manager | 
            
              | DRUCC | Divisional (or District) Rail Users Consultative Committee | 
            
              | DSC | Dual-stacked (or double-stacked) containers | 
            
              | E/A | Extra time Allowed (slack in train's schedule for a section) | 
            
              | EC or ECC | Executive Chair Car | 
            
              | ECR | Empty Coaching Rake | 
            
              | EFC | Eastern Freight Corridor | 
            
              | EQ | Emergency Quota | 
            
              | ESCAP | Economic and Social Commission for Asia and the Pacific | 
            
              | ESM | Electronic Signal Maintainer | 
            
              | ETA | Estimated Time of Arrival | 
            
              | EY | Empty rake (on train monitoring systems) | 
            
              | F | Forward journey (in train number annotations) | 
            
              | FC | First Class, also Financial Commissioner, also Freight Corridor | 
            
              | FEDL | Fully Electrified Double Line | 
            
              | FOB | Foot Overbridge (a pedestrian overpass); Fuel Oil Balance | 
            
              | FOIS | Freight Operation Information System | 
            
              | FRED | Flashing Rear End Device (a warning lamp at the rear of a train) | 
            
              | FT | Foreign Tourist (annotation on reservation charts) | 
            
              | G | Goods | 
            
              | GAL | Goods Avoiding Line | 
            
              | GIT | Goods Intermodal Transshipment (e.g., "GIT yard") | 
            
              | GM | General Manager | 
            
              | GR | General Rules (railway regulations and operating procedures) | 
            
              | GRP | Government Railway Police | 
            
              | GSA | General Sales Agent (for bookings and Indrail passes sold abroad) | 
            
              | GTKM | Gross Tonne KM | 
            
              | HDR | High-Density Route | 
            
              | HDN | High-Density Network ('Golden quadrilateral' and others) | 
            
              | HO | Head Office (a type of quota for tickets) | 
            
              | HP | Handicapped Persons quota | 
            
              | HSRL | High Speed Rail Line (or Link) | 
            
              | IBP | Intermediate Block Post | 
            
              | IC | Inspection Carriage (Saloon) | 
            
              | ICD | Inland Container Depot | 
            
              | ICTT | International Container Transshipment Terminal | 
            
              | I-ASK | Inter-Active Status Kiosk (to check reservation / train status) | 
            
              | IMPRESS | Integrated Multi-train Passenger REServation System | 
            
              | IOH | Intermediate Overhaul | 
            
              | IOW | Inspector of Works | 
            
              | IRMP | Integrated Railway Modernization Plan | 
            
              | IRP | Indrail Pass | 
            
              | IRS | Indian Railway Standard (pre-Independence railway standards body) | 
            
              | IRVS | Interactive Voice Response System | 
            
              | JOH | Junction of Head - point where the tongue rail approaches the main rail in a switch | 
            
              | JUSBRL | Jammu Udhampur Srinagar Baramulla Rail Link (Kashmir Valley railway project) | 
            
              | LB | Lower Berth (annotation on ticket for sleeping accommodation) | 
            
              | LC | Level Crossing | 
            
              | LHF | Long Hood Forward | 
            
              | LHL | Long Hood Leading | 
            
              | LI | Loco Inspector | 
            
              | L/L | Local Line | 
            
              | LQ | Ladies Quota | 
            
              | LRT | Light Rail Transit | 
            
              | LV | Last Vehicle | 
            
              | MB | Middle Berth (annotation on ticket for sleeping accommodation) | 
            
              | MCO | Military Control Office (coordinates ticketing and accommodation for military personnel at some railway stations) | 
            
              | M/E | Mail/Express (on tickets) | 
            
              | MG | Meter Gauge, also Motor Generator | 
            
              | MGC | Mekong Ganga Cooperation group, an association of India and south-east Asian countries, which among other things aim to build a rail link from India to Vietnam. | 
            
              | M/L | Main Line | 
            
              | MOW | Maintenance of Way | 
            
              | MRT | Medical Relief Train (self-propelled medical van for accidents) | 
            
              | MRTC | Mobile Radio Train Communication | 
            
              | MSL | Mean Sea Level | 
            
              | MTP | Metropolitan Transport Project (body studying Calcutta's transit problems in the 1960's) | 
            
              | NETRA | Network of Electrification -- Testing and Recording Apparatus | 
            
              | NG | Narrow Gauge | 
            
              | NLT | Not Losing Time | 
            
              | NMG | New Maruti Goods / New Modified Goods (wagons) | 
            
              | NOSTRAC | North-South Transport Corridor (proposed Central Asia - Iran - India link) | 
            
              | NP | Non-pooled (referring to freight stock) | 
            
              | NR | 'Not Received' (referring to freight consignments delayed or missing in transit) | 
            
              | NRC | Non-railway Customer (any customer other than the zonal railways, for the products of CLW, DLW, etc.) | 
            
              | NTES | National Train Enquiry System (phone-based train/reservation status) | 
            
              | NTKM | Net Tonne-Kilometer | 
            
              | NV | Non-Vegetarian (meal or restaurant) | 
            
              | NVOCC | Non-Vehicle Owning/Operating Common Carrier | 
            
              | OA | Out-Agency | 
            
              | OCV | Other Coaching Vehicle | 
            
              | OIGS | On India Government Service (for mail, etc.) | 
            
              | Ordy. | Ordinary = Stopping passenger (on tickets) | 
            
              | OSD | Officer on Special Duty | 
            
              | OYWS | Own Your Wagon Scheme | 
            
              | PAR | Parcel Service (in indicating kinds of bookings available at ticket agency) | 
            
              | PCV | Passenger Coaching Vehicle | 
            
              | PF | Platform (sometimes P/F) | 
            
              | PH | Parliamentary Quota | 
            
              | PNR | Passenger Name Record (Passenger Numeric Record?) (identifying number for ticket) | 
            
              | POH | Periodic Overhaul | 
            
              | POL | Petroleum, Oil, and Lubricants (designation for oil cargo) | 
            
              | PQ | Pooled Quota | 
            
              | PQWL | Pooled Quota Waiting List | 
            
              | PRS | Passenger Reservation System | 
            
              | PS | Passenger Service (in indicating kinds of bookings available at ticket agency) | 
            
              | PSCT | Port-side Container Terminal | 
            
              | PU | Production Unit | 
            
              | PWI | Permanent Way Inspector | 
            
              | R | Return journey (in train number annotations) | 
            
              | RA | Running Allowance (in calculating drivers' pay) | 
            
              | RAC | Reservation Against Cancellation | 
            
              | RCC | Railway Convention Committee (also see above) | 
            
              | R Fee, Res Fee | Reservation fee (annotation on ticket) | 
            
              | RJQ | Return Journey Quota | 
            
              | RLWL | Running Line Waiting List | 
            
              | RMS | Railway Mail Service | 
            
              | ROB | Road Over-bridge (i.e., road goes over train tracks) | 
            
              | ROH | Routine Overhaul | 
            
              | RO-RO (RORO) | Roll-on, roll-off service (auto transport) | 
            
              | ROW | Right of Way | 
            
              | RPF | Railway Pension Fund (also see above, organizations) | 
            
              | RR | Railway Receipt, Refreshment Room | 
            
              | RRF | Railway Reserve Fund | 
            
              | RTR | Ready-to-Run (modelling kits) | 
            
              | RTSA | Rail Travellers' Service Agents | 
            
              | RUB | Road Under-bridge (i.e., road goes under train tracks) | 
            
              | SATIS | Station Area Traffic Improvement Scheme | 
            
              | S Ch, SF Ch | Superfast Charges (annotation on ticket) | 
            
              | SCRA | Special Class Railway Apprentice | 
            
              | SEB | State Electricity Board (any of the state bodies supplying electricity to IR) | 
            
              | Sh. CC | Shatabdi Chair Car | 
            
              | SHF | Short Hood Forward | 
            
              | SHL | Short Hood Leading | 
            
              | SIL | Safety Integrity Level - statistical measure of reliability of a safety system such as an interlocking system | 
            
              | SLB | Side Lower Berth (annotation on ticket for sleeping accommodation) | 
            
              | SM | Station Master | 
            
              | SPART | Self-Propelled Accident Relief Train - 3-coach accident relief rakes with two diesel power packs | 
            
              | SPURT | Self-Propelled Ultrasonic Rail Testing cars | 
            
              | SR | Subsidiary Rules (for railway operation, see GR) | 
            
              | SRUCC | Suburban Rail Users Consultative Committee (for Mumbai suburban services) | 
            
              | SS | Station Superintendent; Substation (electrification) | 
            
              | SSD | Spring Setting Device - spring-loaded mechanism on some switches to ensure proper alignment of tongue and stock rails | 
            
              | SSE | Senior Section Engineer | 
            
              | S&T | Signalling & Telecommunications | 
            
              | STA | Suburban Traffic Avoiding line : the fifth line between Borivali and Bandra Marshalling Yard, and between Mahim Junction and Mumbai Central in the Mumbai system. | 
            
              | SUB | Side Upper Berth (annotation on ticket for sleeping accommodation) | 
            
              | TAAG | Trains At A Glance (a timetable publication) | 
            
              | TAR | Trans-Asian Railway (another proposed grand pan-Asian route) | 
            
              | TBO | Town Booking Office | 
            
              | TC | Trailer Car (unpowered car in EMU rake), Ticket Checker / Ticket Collector | 
            
              | TCF | Train Coming From (condition of block instrument) | 
            
              | TDR | Ticket Deposit Receipt (when surrendering ticket for cancellation / refund) | 
            
              | TEU | Twenty-foot Equivalent Unit (for measuring container traffic; a standard 40-foot container is 2 TEUs) | 
            
              | TGT | Train Going To (condition of block instrument) | 
            
              | TMS | Train Management System | 
            
              | TRS | Traction Rolling Stock | 
            
              | TS | Train Superintendent | 
            
              | TT | Timetable | 
            
              | TTE | Travelling Ticket Examiner | 
            
              | TQ | Tatkal Quota | 
            
              | TXR | Train Examiner, the officer who issues the BPC and VCC (Train Inspector) | 
            
              | UB | Upper Berth (annotation on ticket for sleeping accommodation) | 
            
              | UEC | Universal Emergency Communication (a system of on-board communication in some trains) | 
            
              | V | Vegetarian (meal or restaurant) | 
            
              | V Ch, Vou Ch | Voucher charges (annotation on ticket) | 
            
              | VG | Vegetarian (meal or restaurant), also Vehicle Guidance (the record of identifying numbers for coaches/wagons that make up a train) | 
            
              | VLRR | Vegetarian Light Refreshment Room | 
            
              | VT | Victoria Terminus (now Chhatrapati Shivaji Terminus) | 
            
              | WFC | Western Freight Corridor | 
            
              | WL, W/L | Waiting List; Wait-Listed (ticket issued without confirmed accommodations)
                
                (Also as a sign: Whistle on approach to Level crossing!) | 
            
              | WM | Works Manager | 
            
              | W/T | Without Ticket | 
            
              | ZDOT | Zero Death On Tracks (campaign to reduce fatalities from pedestrian trespassers) | 
            
              | ZISTU | Zonal Integrated S&T Units | 
            
              | ZTC | Zonal Training Centre | 
            
              | 2T | Two-tier (as in "AC-2T" = airconditioned two-tier coach) | 
            
              | 3T | Three-tier |