Finally acknowledging the success of Columbia's LP format and fearful of losing further market share, RCA Victor began issuing LPs itself. Among the first RCA Victor LPs released in 1950 was a performance of "Gaîté Parisienne" by Jacques Offenbach, played by Arthur Fiedler and the Boston Pops Orchestra, which had actually been recorded in Boston's Symphony Hall on June 20, 1947; it was given the catalogue number LM-1001. Non-classical albums were issued with the prefix "LPM". When RCA Victor later issued classical stereo albums (in 1958), they used the prefix "LSC". Non-classical stereo albums were issued with the prefix "LSP". RCA utilized these catalog prefixes until 1973.