I came across two Canadian Intelligence units that I cannot figure out what the abbreviations stand for. The units are part of the Order of Battle of 3rd Canadian Infantry Division, Canadian Army Occupation Force in Germany dated 14 July 1945. They are listed with a number of other Canadian Intelligence Units as under command for local administration only. The two units are: 1 Canadian A.R.I.T. Canadian C.S.I. (b) Detachment Does anyone have any idea what they might be?