The production of neutron beams for energies between ∼20 and 100 MeV is reviewed. Considerations for obtaining monoenergetic beams as well as some of the limiting factors, such as energy resolution, are examined. Production cross sections at 0 deg are reviewed for proton- and deuteron-induced reactions on light elements. Some current facilities in the context of neutron beams obtained by collimation, by the associate particle method, and by the use of a beam swinger are also discussed.