Quantum mechanics; Physics 388 Quantum theory 299 Physics 264 Mechanics 260 Quantum mechanics 166 Engineering 151 Statistical mechanics 126 Statistical physics; Classical mechanics 94 Fluid mechanics 85 Thermodynamics 63 Chemistry 55 Mechanical engineering 51 Mechanics, Analytic 45 Organic chemistry 44 Quantum Mechanics 38 Chemistry, Organic 36 Mathematics 36 Soil mechanics 36 Wave mechanics 28 Quantum chemistry 27 Dynamics 26 Human mechanics 26 Molecular biology 26 Classical mechanics 25 Dissertations, Academic (Ph.D) 25 Genetics 25 Organic reaction mechanisms 25 Law and legislation 24 Nanotechnology 24 Enzymes 23