Able= The code name or "phonetic" for the letter A when talking on the telephone or on the radio

A.R.= Air Burst  

Ack= Assistant

A.G.R.A.= Army Group Royal Artillery

Air OP= Air Observation Post- a light aircraft piloyed by an artillery observer

A.P.= Armour Piercing (shell)

APCBC= Armour Piercing Capped Ballastic Cap, a type of anti tank projectiel

A/S= Angle of Sight-The angle between the line gun-target and the horzontal

Auster= A type of light aircraft used by Air OP Squadrons

Bamboo= Shells falling on own troops

B.C.= Battery Commander, rank of Major

B.M.R.A.= Brigade Major Royal Artillery

B.Q.M.S.= Battery Quartermaster Sergeant

B.S.M.= Battery Sergeant Major

BT= The imaginary line joining battery to target

CB= Counter Battery or Counter Bombardment

CCRA= Commander Corps Royal Artillery

C.P.O.= Command Post Officer

C.P.O.A= command Post Officer Assistant

C.R.A.= Commander Royal Artillery

C.R.U.= Canadian Reinforcement Unit

CCS= Casualty Clearing Station

D.F.Task= Defensive Fire Task

Diver= V1 Missile

D.R.= Despatch Rider

Echolon= A group in the chain if Supply or Administration

F.A.T.= Field Artillery Tractor

F.D.L.= Forward Defended Localities

F.O.O.= Forward Observation Officer

F.O.U.= Forward Observation unit

G.A.P.= Gun Aiming Point

G.P.O= Gun Position Officer

G.P.O.A.= Gun Position Officer Assistant

H.A.A.= Heavy Anti Aircraft

H.B.= Hostile Battery

H.E.= High Explosive

H.Hour= Zero Hour
L.A.A.= Light Anti Aircraft

L.A.D.= Light Aid Detachment of R.E.M.E attached to a Regiment

L.M.G.= Light Machine Gun

Me= Messcherschmitt, German Aircraft

Mike Target= Regimental Target

MO= Medical Officer

M.P.I= Mean Point of Impact

M.V.= Muzzle Velocity

Murder= Same name for Stonk, but for a concentration of fire at one point

O.C.T.U.= Officer Cadet Training Unit

O.P= Observation Post

O.P.A.= Observation Post Assistant

O.T.= The imaginary line Observation Post Target

Pepperpot= A concentration fired by A.A or anti tank guns, Mortar, MGs etc, in a ground role to strenghten the fire plan for an attack

Pheasant= Security name for a 17 pounder Anti Tank Gun

Robert= Security name for a 6 pounder Anti Tank Gun

Sitrep= Situation Report

Stonk= A linear concentration

U Target= Division Target

V Target= Corps Target

William Target= Target to be engaged by all available guns of a Army

Yoke Target= A.G.R.A. Target

Zeroing= Adjusting gun sights from fall of shot

Zero Hour= The hour at wich attacking troops cross a starting line