Boosey & Hawkes is a British music publisher purported to be the largest specialist classical music publisher in the world. Until 2003, it was also a major manufacturer of brass, string and woodwind musical instruments.Formed in 1930 through the merger of two well-established British music businesses, the company controls the copyrights to much major 20th-century music, including works by Leonard Bernstein, Benjamin Britten, Aaron Copland, Sergei Prokofiev, and Igor Stravinsky.