The Library uses the Library of Congress Classification scheme to arrange its materials. The following gives an outline of the main subject divisions of the Library of Congress Classification.
| Class | Subject | ||
|---|---|---|---|
| A | General Works includes : | ||
| AE | Encyclopedias | ||
| AS | Academies and Learned Societies | ||
| AY | Yearbooks, Almanacs, Directories | ||
| B | Philosophy, Psychology, Religion | ||
| C | Auxiliary Sciences of History : | ||
| Archaeology, Archives, Numismatics, Biography | |||
| D | History (other than American) | ||
| DS | History of Asia | ||
| 701-799 | China | ||
| 796.H7 | Hong Kong | ||
| E-F | American History (F includes Canada, Mexico, South America) | ||
| G | Geography (General), Atlases, Maps | ||
| 155 | Tourism | ||
| GA | Mathematical Geography, Cartography | ||
| GB | Physical Geography | ||
| GC | Oceanography | ||
| GF | Human Ecology | ||
| GN | Anthropology | ||
| GR | Folklore | ||
| GT | Manners and Customs (General) | ||
| GV | Recreation, Leisure | ||
| H | Social Sciences | ||
| HA | Statistics | ||
| HB | Economic Theory | ||
| HC | Economic History and Conditions by Country | ||
| 426-430 | China | ||
| 470.3 | Hong Kong | ||
| HD | Industries, Land Use, Labor | ||
| 28-70 | Management | ||
| HE | Transportation and Communication | ||
| HF | Commerce: Business | ||
| 5410-5418 | Marketing | ||
| 5601-5686 | Accountancy | ||
| 5801-6182 | Advertising | ||
| HG | Finance : Money, Banking, Investment, Insurance | ||
| HJ | Public Finance : Revenue, Taxation, Expenditure, Public Credit, | ||
| Local Finance | |||
| HM | Sociology | ||
| HN | Social History and Conditions, Social Problems, Social Reform | ||
| HQ | Social Groups: Family, Marriage, Woman | ||
| HS | Societies: Secret, Benevolent, etc. | ||
| HT | Communities, Classes, Races | ||
| HV | Social Pathology, Social and Public Welfare, Criminology | ||
| J | Politics and Government | ||
| K | Law (General) and Law of Hong Kong | ||
| KD | Law of the United Kingdom and Ireland | ||
| KF | Law of the United States | ||
| KNR | Law of Hong Kong (Pre-1997) | ||
| KNQ | Law of China, Law of Hong Kong (Post-1997) | ||
| L | Education (General) | ||
| 900-991 | Directories of Educational Institutions | ||
| LB | Theory and Practice of Education: Teaching, Teacher Training, School Administration and Organization | ||
| LC | Special Aspects of Education: Social Aspects, Economic Aspects and Education of Special Classes of Persons | ||
| LG | Individual Institutions: Asia, Africa | ||
| 51-53 | China, including Hong Kong | ||
| M | Music | ||
| N | Visual Arts | ||
| NA | Architecture | ||
| NB | Sculpture | ||
| NC | Drawing, Design, Illustration, Commercial Arts, Graphics | ||
| ND | Painting | ||
| NE | Print Media | ||
| NK | Decorative Arts, Applied Arts, Decoration and Ornament | ||
| NX | Arts in General | ||
| P | Language and Literature (General) | ||
| Philology, Linguistics | |||
| PE | English Language and Literature | ||
| PL | Oriental Languages and Literatures | ||
| PN | Literature (General) | ||
| 1997 | Feature Films | ||
| PR | English Literature, Fiction | ||
| PS | American Literature, Fiction | ||
| Q | Science (General) | ||
| QA | Mathematics | ||
| 76 | Computer Science | ||
| QB | Astronomy | ||
| QC | Physics | ||
| QD | Chemistry | ||
| QE | Geology | ||
| QH | Natural History (General), Biology (General), Ecology | ||
| QK | Botany | ||
| QL | Zoology | ||
| QM | Human Anatomy | ||
| QP | Physiology | ||
| QR | Microbiology | ||
| R | Medicine (General) | ||
| RA | Public Aspects of Medicine: Medicine and the State, Public Health, | ||
| Environmental Health | |||
| RB | Pathology including Medical Laboratory Technique | ||
| RC | Internal Medicine including Neurology and Psychiatry, Geriatrics, | ||
| Industrial Medicine, Radiography | |||
| RD | Surgery | ||
| RE | Ophthalmology including Ophthalmic Optics | ||
| RF | Diseases of Ear, Nose and Throat | ||
| RG | Gynecology and Obstetrics | ||
| RJ | Pediatrics | ||
| RK | Dentistry including Dental Technology | ||
| RL | Dermatology | ||
| RM | Therapeutics including Occupational Therapy, Physiotherapy, Pharmacology | ||
| RS | Pharmacy and Materia Medica | ||
| RT | Nursing | ||
| RV | Botanic, Thomsonian and Eclectic Medicine | ||
| RX | Homeopathy | ||
| RZ | Other Systems of Medicine | ||
| S | Agriculture (General) | ||
| SB | Plant Culture | ||
| SD | Forestry | ||
| SF | Animal Culture | ||
| SH | Aquaculture, Fisheries | ||
| SK | Hunting Sports | ||
| T | Technology (General) | ||
| TA | Engineering (General), Civil Engineering | ||
| 501-625 | Surveying | ||
| 1500-1820 | Applied Optics | ||
| TC | Hydraulic Engineering | ||
| TD | Environmental Technology, Sanitary Engineering | ||
| TE | Highway Engineering, Roads and Pavements | ||
| TF | Railroad Engineering and Operation | ||
| TG | Bridge Engineering | ||
| TH | Building Construction | ||
| TJ | Mechanical Engineering and Machinery | ||
| TK | Electrical Engineering | ||
| 7800-7895 | Electronics, including Computer Hardware | ||
| 9001-9401 | Nuclear Engineering, Atomic Power | ||
| TL | Motor Vehicles, Aeronautics, Astronautics | ||
| TN | Mining Engineering, Metallurgy | ||
| TP | Chemical Technology including textile bleaching, dyeing, printing, etc. | ||
| TR | Photography, Applied Photography (Photogrammetry), Photomechanic Processes | ||
| TS | Manufactures | ||
| 1300-1865 | Textiles | ||
| TT | Handicrafts, Arts and Crafts | ||
| 502 | Fashion | ||
| TX | Home Economics | ||
| 645-840 | Cookery | ||
| 901-950 | Hotel and Management and Catering Services | ||
| U | Military Science | ||
| V | Naval Science | ||
| VK | Navigation, Merchant Marine | ||
| VM | Naval Architecture, Shipbuilding: Marine Engineering | ||
| Z | Bibliography and Library Science | ||