CRA:    Commander Royal Artillery

DCLI:    Duke of Cornwall’s Light Infantry

DCM:    Distinguished Conduct Medal

FOO:    Forward Observation Officer

GSO1:     General Staff Officer, grade 1

HAC:    Honourable Artillery Company

LSI:    Landing Ships Infantry

MO:    Medical Officer

MT:    Motor Transport

OCTU:    Officer Cadet Training Unit

O Group:    Orders Group

OP:    Observation Post

OPU:    an officer producing section of the Regiment

PIAT:    Projectile Infantry Anti-Tank

RAOC:    Royal Army Ordnance Corps

REME:   Royal Electrical Mechanical Engineers

RTO:    Rail Transport Officer

SP:    Self Propelled (gun)