Follow these classification numbers on the shelves of Hong Kong Studies and Hong Kong Government Documents Collections to find information on:
| Major Subjects | LC Class |
| General (Yearbooks, Almanacs, Directories) | A (AY) |
| Philosophy, Psychology, Religion (Taoism, Buddhism, Christianity) | B (BL, BQ, BR - BX) |
| Genealogy, Biography | CS, CT |
| History of Hong Kong | DS796.H7 – H797 |
| Geography (Maps of Hong Kong) | G (G2308.H45) |
| Environment, Anthropology, Folklore, Recreation | GE, GN, GR, GV |
| Statistics, Economic theory | HA, HB |
| Price, Income | HB221 - 236, HB522 - 715 |
| Population | HB848 - 3697 |
| Economy (Economy of Hong Kong) | HC (HC428.H6) |
| Industries. Land use. Labour | HD |
| Cost & Standard of Living | HD6977 - 7080 |
| Housing | HD7291 - 7390 |
| Housing Policy | |
| Hong Kong Housing Authority | |
| Hong Kong Housing Society | |
| Transport & Communication | HE |
| Commerce, Finance, Public Finance | HF, HG, HJ |
| Sociology, Family, Marriage & Women | HM, HQ1 - 2044 |
| Social Pathology, Social Welfare | HV |
| Public Administration | JQ1499 - 1749 |
| Law of Hong Kong | KNR |
| Education (Primary, Secondary & Higher Education) | L (LB) |
| School Annual Reports | LG51 - 53 |
| Music, Fine Arts | M, N |
| Lang. & Lit. (HK Authors' Chinese literary works) | PL (PL3032.H6) |
| Literature (Drama) | PN (PN1600 - 3307) |
| Motion Pictures | PN1993.5.H6 |
| Science, Agriculture, Technology | Q, S, T |
