Harmos is an album by Barry Guy and the London Jazz Composers' Orchestra that features a recording of a large-scale, 44-minute composition by Guy. It was recorded in April 1989, just before the LJCO's 20th anniversary, in Zürich, Switzerland, and was released later that year by Intakt Records. Guy interpreted the Greek title in its original meaning of "coming together," and the work attempts to find solutions to the challenges surrounding the coexistence of improvisation and composition.