QA1-939 Mathematics
QA1-43 General
QA47-59 Tables
QA71-90 Instruments and machines
QA75-76.95 Calculating machines
QA75.5-76.95 Electronic computers. Computer science
QA76.75-76.765 Computer software
QA101-(145) Elementary mathematics. Arithmetic
QA150-272.5 Algebra
QA273-280 Probabilities. Mathematical statistics
QA299.6-433 Analysis
QA440-699 Geometry. Trigonometry. Topology
QA801-939 Analytic mechanicsQA1-939 Mathematics
QA1-43 General
QA47-59 Tables
QA71-90 Instruments and machines
QA75-76.95 Calculating machines

QA75.5-76.95 Electronic computers. Computer science

QA76.75-76.765 Computer software

QA101-(145) Elementary mathematics. Arithmetic
QA150-272.5 Algebra
QA273-280 Probabilities. Mathematical statistics
QA299.6-433 Analysis
QA440-699 Geometry. Trigonometry. Topology
QA801-939 Analytic mechanics

QB1-139 General
QB140-237 Practical and spherical astronomy
QB275-343 Geodesy
QB349-421 Theoretical astronomy and celestial mechanics
QB455-456 Astrogeology
QB460-466 Astrophysics
QB468-480 Non-optical methods of astronomy
QB495-903 Descriptive astronomy

QB500.5-785 Solar system
QB799-903 Stars

QB980-991 Cosmogony. Cosmology

QC1-999 Physics

QC1-75 General
QC81-114 Weights and measures
QC120-168.85 Descriptive and experimental mechanics
QC170-197 Atomic physics. Constitution and properties of matter

Including molecular physics, relativity, quantum theory, and solid state physics

QC221-246 Acoustics. Sound
QC251-338.5 Heat

QC310.15-319 Thermodynamics

QC350-467 Optics. Light

QC450-467 Spectroscopy

QC474-496.9 Radiation physics (General)
QC501-766 Electricity and magnetism
QC501-(721) Electricity

QC669-675.8 Electromagnetic theory
QC676-678.6 Radio waves (Theory)
QC701-715.4 Electric discharge

QC717.6-718.8 Plasma physics. Ionized gases
QC750-766 Magnetism
QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity

QC793-793.5 Elementary particle physics
QC794.95-798 Radioactivity and radioactive substances

QC801-809 Geophysics. Cosmic physics
QC811-849 Geomagnetism
QC851-999 Meteorology. Climatology Including the earth's atmosphere
QC974.5-976 Meteorological optics
QC980-999 Climatology and weather
QC994.95-999 Weather forecasting

Science and Technology
8000 - 8099		Science. General
8100 - 8199		Mathematics
8200 - 8299		Physics
8400 - 8499		Astronomy