This document summarizes different types of program music and composers. It discusses program music as instrumental music that depicts emotions, moods, scenes or stories. The main forms of orchestral program music are program symphonies, concert overtures, symphonic poems, and incidental music. It provides examples of different composers and their works, including Berlioz and his Symphonie fantastique, Liszt and his symphonic poems, Strauss and his tone poems, and Mendelssohn's incidental music including the famous "Wedding March". The document serves to inform the reader about program music genres and influential composers in the field.