| Biological | ||
|   Code |   Subject | |
| 1000 | Biochemistry and biophysics | |
| 1010 | Nutrition and metabolism | |
| 1020 | Physiology | |
| 1030 | Cellular biology | |
| 1040 | Molecular biology | |
| 1050 | Developmental biology | |
| 1060 | Biology (whole systems) | |
| 1070 | Ecology | |
| 1080 | Genetics (includes breeding) | |
| 1090 | Immunology | |
| 1100 | Bacteriology | |
| 1101 | Virology | |
| 1102 | Mycology | |
| 1103 | Other microbiology (includes protozoology, phycology, etc.) | |
| 1110 | Parasitology | |
| 1120 | Nematology | |
| 1130 | Entomology and acarology | |
| 1140 | Weed science | |
| 1150 | Toxicology | |
| 1160 | Pathology | |
| 1170 | Epidemiology | |
| 1180 | Pharmacology | |
| 1190 | Limnology | |
| Physical | ||
|   Code |   Subject | |
| 2000 | Chemistry | |
| 2010 | Physics | |
| 2020 | Engineering | |
| 2030 | Geology | |
| 2040 | Mineralogy | |
| 2050 | Hydrology | |
| 2060 | Geography | |
| 2061 | Pedology | |
| 2070 | Meteorology and climatology | |
| 2080 | Mathematics and computer sciences | |
| 2090 | Statistics, econometrics, and biometrics | |
| Social and Behavioral | ||
|   Code |   Subject | |
| 3000 | Anthropology | |
| 3010 | Economics | |
| 3020 | Education | |
| 3030 | Information and communication | |
| 3040 | History | |
| 3050 | Law | |
| 3060 | Political science | |
| 3070 | Psychology | |
| 3080 | Sociology | |
| 3090 | Sensory science (human senses) | |
| 3100 | Management | |
| 3110 | Art and architecture | |
| 3111 | Landscape architecture | |