MIL-HDBK-280 (NOTICE 1), MILITARY HANDBOOK NEUTRON HARDNESS ASSURANCE GUIDELINES FOR SEMICONDUCTOR DEVICES AND MICROCIRCUITS. MIL-HDBK-280, dated 19 February 1985, is hereby canceled and superseded by MIL-HDBK-814, “Ionizing Dose and Neutron Hardness Assurance Guidelines for Microcircuits and Semiconductor Devices”.