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Integrated electronic techniques have been developed to the point where they can be applied to many types of military equipment. This paper discusses how these techniques are being used to increase the reliability and reduce the size and weight of three selected types of equipment used in military communications and radar systems. Redundancy is used in the first of these equipments, an ultrareliable UHF transceiver. The two additional equipments, a VLF/LF frequency synthesizer and a radar receiver, are greatly reduced in size and weight by the direct application of microcircuit techniques. The basic problems created by system size reduction are discussed, and the design and fabrication techniques used for the three equipments are described.