Name
- A.P. Watt and Son, literary agents, 1875-20121
- Abbots Langley Gilbert and Sullivan Society, 1950-1
- Aber, Adolf, music publisher, 1893-1960, http://isni.org/isni/000000...2
- Adair, Yvonne, composer, 1897-19891
- Adams, David, music publisher, fl 1955-19906
- Adler, Peter Herman, conductor, 1899-1990, http://isni.org/isni/000000...1
- Aldeburgh Festival of Music and the Arts, 1948-1
- Allan and Co. Pty Ltd., Australian publishing company, fl 1954-19601
- Allan, Geoffrey, of Allan and Co. Pty. Ltd., fl 1954-19571
- Almeida, Antonio Jacques, conductor, 1928-19971
- Almond, L., of Trowbridge, fl 1954-19571
- Alwyn, William, composer, 1905-19851
- American Society of Composers, Authors and Publishers, 1914-6
- Ampex Corporation, electronics firm, 1944-1
- Anglo-Soviet Music Press, music publishers, 1948-1970?1
- Armstrong, Thomas Henry Wait, Knight, organist and college administrator, 1898-19943
- Arthur, Hartney, actor and film director, 1917-2004, http://isni.org/isni/000000...1
- Arts Council of Great Britain, 1946-19943
- Ashdown, Frank, music publisher, fl 1930-19602
- Askew, Amy, correspondent of Boosey and Hawkes Ltd., fl 1954-19571