Review papers on high-power gas lasers profiles the state of the art in 1975. Topics include physics of atomic gas lasers, kinetic processes in CO2 lasers, e-beam pumping of ultraviolet gas lasers, new electronic transition lasers, chemical lasers, gas-dynamic lasers, high-efficiency carbon-monoxide lasers, pulsed CO2 lasers, continuouswave high-power lasers, atomic oxygen lasers, and Raman spectroscopy gas diagnostics.