psc were the initials which appeared in the service lists denoting that a British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 officer had attended the Staff College, Camberley

Staff College, Camberley

Staff College, Camberley, Surrey, was a staff college for the British Army from 1802 to 1997, with periods of closure during major wars. In 1997 it was merged into the new Joint Services Command and Staff College.-Origins:...

 or, prior to 1956 and Pakistani independence, the Command and Staff College

Command and Staff College

The Command and Staff College was established in 1907 at Quetta, Balochistan, British Raj, now in Pakistan, and is the oldest and the most prestigious institution of the Pakistan Army. It was established in 1905 in Deolali and moved to its present location at Quetta in 1907 under the name of Quetta...

, Quetta. Since the 1997 amalgamation of staff training, officers now receive the letters psc(j) from the Joint Services Command and Staff College

Joint Services Command and Staff College

Joint Services Command and Staff College is a British military academic establishment providing training and education to experienced officers of the Royal Navy, Army, Royal Air Force, Ministry of Defence Civil Service, and serving officers of other states.-History:JSCSC combined the single...

.

Sometimes, overbearing and over-confident officers having passed staff college are said to be Practically Senior to Christ!