| Main Category | Sub-category code | Sub-category title |
| Natural Sciences | | |
| | 101 | Mathematics |
| | 102 | Computer and Information Sciences |
| | 103 | Physical Sciences |
| | 104 | Chemical Sciences |
| | 105 | Earth and Related Environmental Sciences |
| | 106 | Biological Sciences (Not Medical nor Agricultural) |
| | 107 | Other Natural Sciences |
| Engineering and Technology | | |
| | 201 | Civil Engineering |
| | 202 | Electrical/Electronic/Information Engineering |
| | 203 | Mechanical Engineering |
| | 204 | Chemical Engineering |
| | 205 | Materials Engineering |
| | 206 | Medical Engineering |
| | 207 | Environmental Engineering |
| | 208 | Environmental Biotechnology |
| | 209 | Industrial Biotechnology |
| | 210 | Nano-technology |
| | 211 | Other Engineering and Technologies |
| Medical and Health Sciences | | |
| | 301 | Basic Medicine |
| | 302 | Clinical Medicine |
| | 303 | Health Sciences |
| | 304 | Medical Biotechnology |
| | 305 | Other Medical and Health Sciences |
| Agricultural and Veterinary Sciences | | |
| | 401 | Agriculture, Forestry and Fisheries |
| | 402 | Animal and Dairy Science |
| | 403 | Veterinary Science |
| | 404 | Agricultural Biotechnology |
| | 405 | Other Agricultural Sciences |
| Humanities and the Arts | | |
| | 601 | History and Archaeology |
| | 605 | Other Humanities |