In music, Op. 103 stands for Opus number 103. Compositions that are assigned this number include:
Beethoven – Octet Haydn - Quartet No. 68 in D minor Prokofiev – Piano Sonata No. 9 Saint-Saëns – Piano Concerto No. 5 Schumann – Mädchenlieder (2 women's voices and piano) Shostakovich – Symphony No. 11