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;74xx:A GWR 7400 Class 0-6-0PT engine
;A.J.Hill:Alfred John Hill, Chief Mechanical Engineer (CME) of the Great Eastern Railway 1912-1922
;ANPR:Automatic Number Plate Recognition
;Armstrong:Joseph Armstrong, Locomotive, Carriage and Wagon Superintendent of the Great Western Railway 1864-1877
;ARPS:Association of Railway Preservation Societies
;ATC:Automatic Train Control, a form of limited cab signalling developed by the GWR in 1906, superseded by BR's Automatic Warning System
;Atlantic:Locomotive with a 4-4-0 wheel configuration
;Austin:John Austin GRA, renowned Bridgnorth-based member railway artist and Fellow of The Guild of Railway Artists
;AWS:Automatic Warning System, a form of limited cab signalling introduced in 1956
;B&MR:Brecon & Merthyr Tydfil Junction Railway
;CBILS:Coronavirus Business Interruption Loan Scheme, a government backed loan scheme
;CFPS:Class 40 Preservation Society
;Ch:Chain. 22 yards or 1/80th of a mile
;chain
;chains:As a unit of measurement, 22 yards or 1/80th of a mile
;CNC:Computer Numerical Control. A computer converts the design produced by Computer Aided Design software into numbers which are used to control the movement of the cutter.
;Collett:Charles Benjamin Collett, Chief Mechanical Engineer (CME) of the Great Western Railway 1922-1941
;Commonwealth bogie
;Commonwealth bogies:BR's standard carriage bogie from 1955 to 1963, originally designed by the Commonwealth Steel Company (US) and manufactured under licence in the UK. A heavyweight cast steel bogie incorporating sealed roller bearings and coiled suspension to give a superior ride quality and a speed rating of 100mph.
;Composite:Carriage having more than one class of seating, ie First and Third or latterly First and Standard.
;Conflat:GWR telegraphic code signifying a flat wagon for containers
;CWR:Continuous Welded Rail, where joints between lengths of rail are welded rather than connected by fishplates. ;DCMS:The Department for Digital, Culture, Media & Sport (Department for Culture, Media and Sportuntil 2017);Dean:William Dean, Chief Locomotive Engineer of the Great Western Railway 1877-1902
;Departmental:Rolling stock used for the railway’s own functions (engineering etc.) rather than for general passenger or goods traffic.
;DMBS:Driving Motor Brake Second
;DMU:Diesel Multiple Unit
;Down:In reference to the direction of travel means away from the major terminus (i.e. towards Bridgnorth on the present day SVR)
;Drott:Drott Manufacturing Company machine similar to a bulldozer used to level and compact soil
;Drummond:Dugald Drummond, Locomotive Engineer, later Chief Mechanical Engineer (CME) of the London & South Western Railway 1895-1905
;DTCL:Driving Trailer Composite with lavatory
;ELR:Engineer's Line Reference, East Lancashire Railway
;E.M.D.:Electro-Motive Diesel, Inc., an American manufacturer of diesel-electric locomotives.
;ESMP :Engineering Services, Motive Power.
;ETH:Electric Train Heating
;ETT:Electric Train Token
;GWS:Great Western Society
;GWSR:Gloucestershire Warwickshire Steam Railway (Commonly known as the Gloucestershire Warwickshire Railway)
;GW(SVR)A:Great Western (SVR) Association
;Hawksworth:Frederick Hawksworth, Chief Mechanical Engineer (CME) of the Great Western Railway 1941-1948
;headstock
;headstocks:The underframe member across each end of a wagon carrying the buffers and coupling. Known as the Bufferbeam on a locomotive.
;HLF:Heritage Lottery Fund (National Lottery Heritage Fund from 2019)
;Holden:Stephen Dewar Holden, Chief Mechanical Engineer (CME) of the Great Eastern Railway 1908-1912
;Hot box:A situation that occurs when an axle bearing overheats, causing damage to the axle box and the axle itself.
;HRA:Heritage Railway Association
;Instanter:A type of three link chain coupling with a special triangular-shaped middle link which provides sufficient slack for coupling, but when rotated through 90 degrees shortens the length of the chain, reducing the slack without the need to wind a screw.
;Internal User:Rolling stock used for the railway’s internal purposes (stores etc.) at one fixed location.
;IOMR:Isle of Man Railway
;Ivatt:Henry George Ivatt, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1946-1948. CME of BR (London Midland Region) 1948-1951
;Johnson:Samuel Waite Johnson, Chief Mechanical Engineer (CME) of the Midland Railway 1873-1903
;Keruing: (Trade name) A type of medium hardwood timber obtained from trees of the genus Dipterocarpus
;LBSCR
;LB&SCR:London Brighton & South Coast Railway
;LNWR:London & North Western Railway
;Loriot:GWR telegraphic code signifying a machine truck
;L.P.O.:Lost Property Office
;LRO:Light Railway Order
;LSWR:London & South Western Railway
;Maunsell:Richard Maunsell, Chief Mechanical Engineer (CME) of the South Eastern and Chatham Railway from 1913-1923, and of the Southern Railway 1923-1937.
;McIntosh:John Farquharson McIntosh, Chief Mechanical Engineer (CME) of the Caledonian Railway 1895-1914
;MEWP
;MEWPs:Mobile elevating work platform
;Mica:GWR telegraphic code signifying a meat van
;Mink:GWR telegraphic code signifying a covered goods van
;Mogo:GWR telegraphic code signifying a covered motor car wagon
;Mogul:Locomotive with a 2-6-0 wheel configuration
;Morton:A type of brakes used on GWR wagons after Grouping in 1923, replacing the earlier DC (Dean Churchward) types.
;MOSI:Museum Of Science & Industry
;MPD:Motive Power Depot
;MR:Midland Railway
;MSC:Manchester Ship Canal;M.S.C.:Manpower Services Commission or Manchester Ship Canal
;M&SWJR:Midland & South West Junction Railway
;NBI:Notice Board Issue. The SVR's on-line method of circulating information to working members.
;NHMF:Trustees of the National Heritage Memorial Fund – see HLF
;NR:Network Rail
;NRM:The Railway Museum, formerly the National Railway Museum
;ORR:Office of Rail and Road, formerly Office of Rail Regulation, the independent safety and economic regulator for Britain's railways which includes HM Railway Inspectorate
;OS:Ordnance Survey
;OTMR:On-Train Monitoring Recorder, a device similar in principle to the flight data recorder found on aircraft
;OW&W
;Pacific:Locomotive with a 4-6-2 wheel configuration
;Prairie:Locomotive with a 2-6-2 wheel configuration
;PRISM:The Preservation of Industrial and Scientific Material (PRISM) Fund, a source of funding from the Arts Council/The Museums, Libraries and Archives Council.
;PTR:Port Talbot Railway & Docks Company
;R&H:
;Ruston:Ruston and Hornsby Ltd. of Lincoln, engineer and locomotive manufacturer acquired by English Electric in 1966. Also, Ruston-Bucyrus Ltd established in 1930 and jointly owned by Ruston and Hornsby and Bucyrus-Erie (US)
;Railtrack:private sector owner of the national railway system from 1994 until 2002, created as part of the privatisation of British Rail. Succeeded by Network Rail
;Raven:Sir Vincent Litchfield Raven, Chief Mechanical Engineer (CME) of the North Eastern Railway 1910-1922
;RCE:Regional Civil Engineer(ing)
;RCH:Railway Clearing House
;Rexine:an early form of vinyl used by the LNER for wall coverings in teak coaches
;RHDR:Romney, Hythe and Dymchurch Railway
;Richard Deeley:Chief Mechanical Engineer (CME) of the Midland Railway 1904-1909
;Riddles:Robert Arthur "Robin" Riddles, Member of the Railway Executive for Mechanical and Electrical Engineering responsible for the design of the British Rail Standard Class locomotives
;RNAD: Royal Naval Armaments Depot
;S&DJR:Somerset & Dorset Joint Railway, jointly operated by the London and South Western and Midland Railways (later Southern and London Midland and Scottish Railways)
;S&HR:Shrewsbury and Hereford Railway
;SECR:South Eastern and Chatham Railway
;Siphon:GWR telegraphic code signifying a milk van
;SLOA:Steam Locomotive Operators Association, formed in 1975 to bring together and assist operators wishing to run steam on the main line
;SMS:Safety Management System
;Snake:GWR telegraphic code signifying a passenger brake van
;solebar
;solebars:The outer member of a vehicle's underframe, running from end to end below the body
;SR:Southern Railway
;Stanier:William Stanier, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1932-1944
;Super D:An LNWR 0-8-0 goods engine
;SURCC:Shropshire Union Railway & Canal Company
;SVR:Severn Valley Railway
;SVRA:Severn Valley Railway Association
;UIC:Union Internationale des Chemins de fer (International Union of Railways)
;Up:In reference to the direction of travel means towards the major terminus (i.e. towards Kidderminster on the present day SVR)
;Urie:Robert Urie, Chief Mechanical Engineer (CME) of the London and South Western Railway 1912-1922
;USATC:United States Army Transportation Corps
;VSOE:Venice Simplon Orient Express
;Wainwright:Harry Smith Wainwright, Locomotive, Carriage and Wagon Superintendent of the South Eastern and Chatham Railway 1899-1913
;WLA: Western Locomotive Association Ltd.
;WMSP:West Midlands Safari Park
;WTT: Working Timetable
