Multigroup cross sections (66 neutron groups and 21 gamma-ray groups) are described for neutron energies from thermal to 400 MeV. The elements considered are hydrogen, 10B, 11B, carbon, nitrogen, oxygen, sodium, magnesium, aluminum, silicon, sulfur, potassium, calcium, chromium, iron, nickel, tungsten, and lead. These cross sections are available from the Radiation Shielding Information Center of the Oak Ridge National Laboratory.