Indeed the most exciting probability of all is that lasers undoubtedly will change our lives in ways we cannot even conceive of now. [Illustration: Figure 33 _Tiny hole drilled in paper clip demonstrates remarkable capability of laser beam. Paper clip is 1¼ inches long. Hole (top) was drilled by the laser microwelder shown in Figure 1._] SUGGESTED REFERENCES Books _ABC’s of Masers and Lasers_, Allan H. Lytel, Howard W. Sams and Company, Inc., Publishers, Indianapolis, Indiana 46206, 1966, 96 pp., $2.25. _The Laser: Light That Never Was Before_, Ben Patrusky, Dodd, Mead and Company, New York 10016, 1966, 128 pp., $3.50. _Masers and Lasers_, Manfred Brotherton, McGraw-Hill Book Company, New York 10036, 1964, 224 pp., $8.50. _Masers and Lasers_, H. Arthur Klein, J. B. Lippincott Company, Philadelphia, Pennsylvania 19105, 1963, 184 pp., $3.95. _The Story of the Laser_, John M. Carroll, E. P. Dutton and Company, Inc., New York 10003, 1964, 181 pp., $3.95. _Quantum Electronics: The Fundamentals of Transistors and Lasers_, John R. Pierce, Doubleday and Company, Inc., New York 10017, 1966, 138 pp., $1.25. _Lasers and Their Applications_, Kurt R. Stehling, The World Publishing Company, Cleveland, Ohio 44102, 1966, 192 pp., $6.00. _Understanding Lasers and Masers_, Stanley Leinwoll, Hayden Book Companies, New York 10011, 1964, 96 pp., $1.95. _Atomic Light: Lasers_, Richard B. Nehrich, Jr., Glenn I. Voran, and Norman F. Dessel, Sterling Publishing Company, Inc., New York 10016, 1967, 136 pp., $3.95. Articles—General and Historical