VADIM MANASSEWITSCH graduated from Columbia University in 1959. Since 1981, he has worked independently as a consultant, teaching frequency synthesis and designing state-of-the-art synthesizers—his specialty for twenty-seven years. Previously, he served as an electrical engineer with Manson Laboratories, Inc., as a project engineer with Westrex Company—a division of Litton Industries—and as a member of the technical staff of RCA's Surface Communications Systems Laboratory. He worked as a project engineer for Polarad Electronic Instruments, as a senior member of the technical staff of ITT's Defense Communications Division, as an engineering consultant for GI's Electronic Systems Division, and as a senior member of the technical staff of Rockland Systems, Inc.