(Click each subclass for details)
Subclass Q
| Q1-390 |
Science (General) |
| Q1-295 |
|
General |
| Q300-390 |
|
Cybernetics |
| Q350-390 |
|
|
Information theory |
Subclass QA
| 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 mechanics |
Subclass QB
| QB1-991 |
Astronomy |
| 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 |
Subclass QC
| 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 |
|
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Meteorological optics |
| QC980-999 |
|
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Climatology and weather |
| QC994.95-999 |
|
|
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Weather forecasting |
Subclass QD
| QD1-999 |
Chemistry |
| QD1-65 |
|
General
Including alchemy |
| QD71-142 |
|
Analytical chemistry |
| QD146-197 |
|
Inorganic chemistry |
| QD241-441 |
|
Organic chemistry |
| QD415-436 |
|
|
Biochemistry |
| QD450-801 |
|
Physical and theoretical chemistry |
| QD625-655 |
|
|
Radiation chemistry |
| QD701-731 |
|
|
Photochemistry |
| QD901-999 |
|
Crystallography |
Subclass QE
| QE1-996.5 |
Geology |
| QE1-350.62 |
|
General
Including geographical divisions |
| QE351-399.2 |
|
Mineralogy |
| QE420-499 |
|
Petrology |
| QE500-639.5 |
|
Dynamic and structural geology |
| QE521-545 |
|
|
Volcanoes and earthquakes |
| QE601-613.5 |
|
|
Structural geology |
| QE640-699 |
|
Stratigraphy |
| QE701-760 |
|
Paleontology |
| QE760.8-899.2 |
|
Paleozoology |
| QE901-996.5 |
|
Paleobotany |
Subclass QH
| QH1-278.5 |
Natural history (General) |
| QH1-(199.5) |
|
General
Including nature conservation, geographical distribution |
| QH201-278.5 |
|
Microscopy |
| QH301-705.5 |
Biology (General) |
| QH359-425 |
|
Evolution |
| QH426-470 |
|
Genetics |
| QH471-489 |
|
Reproduction |
| QH501-531 |
|
Life |
| QH540-549.5 |
|
Ecology |
| QH573-671 |
|
Cytology |
| QH705-705.5 |
|
Economic biology |
Subclass QK
| QK1-989 |
Botany |
| QK1-474.5 |
|
General
Including geographical distribution |
| QK474.8-495 |
|
Spermatophyta. Phanerogams |
| QK494-494.5 |
|
|
Gymnosperms |
| QK495 |
|
|
Angiosperms |
| QK504-(638) |
|
Cryptogams |
| QK640-(707) |
|
Plant anatomy |
| QK710-899 |
|
Plant physiology |
| QK900-989 |
|
Plant ecology |
Subclass QL
| QL1-991 |
Zoology |
| QL1-355 |
|
General
Including geographical distribution |
| QL360-599.82 |
|
Invertebrates |
| QL461-599.82 |
|
|
Insects |
| QL605-739.8 |
|
Chordates. Vertebrates |
| QL614-639.8 |
|
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Fishes |
| QL640-669.3 |
|
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Reptiles and amphibians |
| QL671-699 |
|
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Birds |
| QL700-739.8 |
|
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Mammals |
| QL750-795 |
|
Animal behavior |
| QL791-795 |
|
|
Stories and anecdotes |
| QL799-799.5 |
|
Morphology |
| QL801-950.9 |
|
Anatomy |
| QL951-991 |
|
Embryology |
Subclass QM
| QM1-695 |
Human anatomy |
| QM1-511 |
|
General |
| QM531-549 |
|
Regional anatomy |
| QM550-577.8 |
|
Human and comparative histology |
| QM601-695 |
|
Human embryology |
Subclass QP
| QP1-(981) |
Physiology |
| QP1-345 |
|
General
Including influence of the environment |
| QP351-495 |
|
Neurophysiology and neuropsychology |
| QP501-801 |
|
Animal biochemistry |
| QP(901)-(981) |
|
Experimental pharmacology |
Subclass QR
| QR1-502 |
Microbiology |
| QR1-74.5 |
|
General |
| QR75-99.5 |
|
Bacteria |
| QR99.6-99.8 |
|
Cyanobacteria |
| QR100-130 |
|
Microbial ecology |
| QR171 |
|
Microorganisms in the animal body |
| QR180-189.5 |
|
Immunology |
| QR355-502 |
|
Virology |
