COMSAT Labs is the research and development arm of the public company created by the Communications Satellite Act of 1962. The author conveys some of the enthusiasm of the early years, when a dedicated staff tackled such problems as echo suppression. With the communications satellite industry in flux, a review of its history would have been welcome. Yet this brief work does not live up to its title: It is neither a company history nor the full story of how satellite communications changed the world. Only for comprehensive business history or communications collections.-- Ellen McDermott, NYNEX Corp., White Plains, N.Y.