Contents (List of those interviewed): C.H. Townes, Infared and Optical Masers. A.L. Schawlow, Origins of the Laser. N. Bloembergen, Masers and Nonlinear Optics. G. Gould, Another View of Laser Development. T.H. Maiman, The First Laser. P. Sorokin, The Second Laser and the Dye Laser. A. Javan, The Helium-Neon Laser. R.N. Hall, The Semiconductor Laser. C.K.N. Patel, The Carbon-Dioxide Laser. W. Bridges, The Ion Laser. W.T. Silfvast, Metal-Vapor Lasers. J.J. Ewing, Excimer Lasers. J.M.J. Madey, The Free-Election Laser. D.L. Matthews, The X-Ray Laser. Index.