Class No
 Subject
000
 Generalities
100
 Philosophy & Psychology
200
 Religion
300
 Social Sciences
400
 Language
500
 Natural Sciences & Mathematics
600
 Technology
700
 The Arts
800
 Literature & Rhetoric
900
 Geography & History
                                                        
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Class No
 Subject
301
 Sociology & Anthropology
302
 Social interaction
303
 Social processes
304
 Factors affecting social behaviour
305
 Special groups
306
 Culture & institutions
307
 Communities
310
 General Statistics
333
 Land Economics
370
 Education
371
 School management,special education
372
 Elemenatary education
373
 Secondary education
374
 Adult education
375
 Curriculums
376
 Education of women
377
 Schools & religion
378
 Higher education
379
 Government regulation, control


Class No
 Subject
401
 Language : philosophy & theory
403
 Dictionaries & encyclopaedias
410
 Linguistics
411
 Writing systems
412
 Etymology
413
 Dictionaries
414
 Phonology
415
 Structural systems (Grammar)
417
 Dialectology & historical linguistics
418
 Standard usage, applied linguistics
419
 Verbal language not spoken or written
420
 English & old English
491.43
 Hindi
491.46
 Marathi


Class No
 Subject
500
 Natural Sciences & Mathematics
510
 Mathematics
520
 Astronomy &  Allied Sciences
530
 Physics
540
 Chemistry & allied Sciences
550
 Earth Sciences
560
 Paleontology / Paleozoology
570
 Life Sciences
580
 Botanical Sciences
590
 Zoological Sciences


Class No
 Subject
511
 Mathematics : general principles
512
 Algebra & number theory
513
 Arithmetic
514
 Topology
515
 Analysis (Mathematics)
516
 Geometry
519
 Probabilities & Applied Mathematics


Class No
 Subject
521
 Celestial mechanics
522
 Astronomy : techniques, equipment, materials
523
 Specific celestial bodies & phenomena
525
 Earth (Astronomical geography)
526
 Mathematical Geography
527
 Celestial navigation


Class No
 Subject
531
 Classical mechanics, solid mechanics
532
 Fluid mechanics, liquid mechanics
533
 Gas mechanics
534
 Sound & related vibrations
535
 Light & paraphotic phenomena
536
 Heat
537
 Electricity & electronics
538
 Magnetism
539
 Modern Physics


Class No Subject
541
 Physical & theoretical Chemistry
542
 Techniques, equipment, materials
543
 Analytical Chemistry
544
 Qualitative analysis
545
 Quantitative analysis
546
 Inorganic Chemistry
547
 Organic Chemistry
548
 Crystallography
549
 Mineralogy


Class No
 Subject
551
 Geology, Hydrology, Meteorology
552
 Petrology
553
 Economic Geology


Class No Subject
572
 Human Races
573
 Physical Anthropology
574
 Biology
575
 Evolution & genetics
576
 Microbiology
577
 General nature of life
578
 Microscopy in Biology
579
 Collection and Preservation


Class No
 Subject
581
 Botany
582
 Spermatophyta (Seed-bearing plants)
583
 Dicotyledones
584
 Monocotyledones
585
 Gymnospermae (Pinophyta)
586
 Cryptogamia (Seedless plants)
587
 Pteridophyta (Vascular cryptogams)
588
 Bryophyta
589
 Thallobionta & Prokaryotae


Class No
 Subject
591
 Zoology
592
 Invertebrates
593
 Protozoa, Echinodermata
594
 Mollusca & Molluscoidea
595
 Other vertebrates
596
 Vertebrata (Craniata, Vertebrates)
597
 Cold-blooded vertebrates   Fishes
598
 Aves (Birds)
599
 Mammalia (Mammals)
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