Railways Abbreviations and Acronyms

  1. NWZ
    North West Zone
  2. OCC
    Occupied
  3. OCL
    Operational Communications Link
  4. OCS
    Onegcontrol Switch
  5. OCU
    Operator’s Controk Unit
  6. OE
    Operating Expenditure
  7. OETR
    Outline Engineering Train Requirements
  8. OFN
    Optical Fibre Network
  9. OHL
    Overhead Line
  10. OHNS
    Overhead Line Neutral Section
  11. OLBI
    Off-Line Battery Inverter
  12. OLEAR
    Overhead Line Equipment Asset Register
  13. OLEMI
    Overhead Line Equipment Master Index
  14. OOR
    Out of Round
  15. OPEX
    Operating Expenditure
  16. OPM
    Operational Planning Manager
  17. OPUG
    Other Passengtr Upgrades
  18. ORN
    Overlay Radio Network
  19. OSG
    Operation Safety Group
  20. OSGR
    Ordnance Survey Grid Reference

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