Historic Perspectives—Personal Essays on Historic Developments.- Quantum Theory.- Nuclear Physics.- Theoretical Particle Physics.- Elementary Particle Physics: The Origins.- Astrophysics.- A Century of Relativity.- From Radar to Nuclear Magnetic Resonance.- An Essay on Condensed Matter Physics in the Twentieth Century.- A Short History of Atomic Physics in the Twentieth Century.- Particle Physics and Related Topics.- Quantum Field Theory.- The Standard Model of Particle Physics.- String Theory, Supersymmetry, Unification, and All That.- Accelerators and Detectors.- Anomalous g Values of the Electron and Muon.- Neutrino Physics.- Astrophysics.- Cosmology at The Millennium.- Cosmic Rays: The Most Energetic Particles in the Universe.- Cosmic Microwave Background Radiation.- Black Holes.- Gravitational Radiation.- Deciphering the Nature of Dark Matter.- Nuclear Physics.- Nuclear Physics at the End of the Century.- Stellar Nucleosynthesis.- Atomic, Molecular, and Optical Physics.- Atomic Physics.- Laser Spectroscopy and Quantum Optics.- Atom Cooling, Trapping, and Quantum Manipulation.- Laser Physics: Quantum Controversy in Action.- Quantum Effects in One-Photon and Two-Photon Interference.- From Nanosecond to Femtosecond Science.- Experiment and Foundations of Quantum Physics.- Condensed Matter Physics.- The Fractional Quantum Hall Effect.- Conductance Viewed as Transmission.- Superconductivity.- Superfluidity.- In Touch with Atoms.- Materials Physics.- The Invention of the Transistor.- Statistical Physics and Fluids.- Statistical Mechanics: A Selective Review of Two Central Issues.- Scaling, Universality, and Renormalization: Three Pillars of Modern Critical Phenomena.- Insights from Soft Condensed Matter.- Granular Matter: A Tentative View.- Fluid Turbulence.- Pattern Formation in Nonequilibrium Physics.- Plasma Physics.- The Collisionless Nature of High-Temperature Plasmas.- Chemical Physics and Biological Physics.- Chemical Physics: Molecular Clouds, Clusters, and Corrals.- Biological Physics.- Brain, Neural Networks, and Computation.- Computational Physics.- Microscopic Simulations in Physics.- Applications of Physics to Other Areas.- Physics and Applications of Medical Imaging.- Nuclear Fission Reactors.- Nuclear Power—Fusion.- Physics and U.S. National Security.- Laser Technology.- Physics and the Communications Industry.