Superconducting magnets for accelerators, beam lines and detectors

After twenty years of intensive R & D, superconducting magnets are now widely used in High Energy Physics laboratories. Large detectors and spectrometers have been the first area of successful application. New giant accelerators under construction or planned are definitely based on superconducting components whilst the use for beam lines appears more restricted to special purpose elements. A review of these various applications is presented.