Ordnance provision system. [Ordnance catalog (ordnance provision system)]: Group F, Board, correction, range, M1, board, correction, range, M1A1, board, correction, range, M1923, board, range, M1909, board, range, Pratt, M1905, major items and maintenance parts required for maintenance of board, correction, range, M1A1, addendum; Dec. 11, 1942.