Trustworthy, administrator
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alternative abbreviations used
;NRM:National Railway Museum
;OTMR:On-Train Monitoring Recorder, a device similar in principle to the flight data recorder found on aircraft.
;OW&W;OWW:Oxford Worcester and Wolverhampton Railway
;P.W.
;P.Way
;S&T:Signals & Telegraph
;Sambron:Sambron SA, a French manufacturer of telehandler-type forklifts used by the SVR for coaling
;SE&CR;SECR:South Eastern & Chatham Railway
;Siphon:GWR telegraphic code signifying a milk van
;SMS:Safety Management System
