Preclinical Sciences |
| QS | | Human Anatomy |
| QT | | Physiology |
| QU | | Biochemistry |
| QV | | Pharmacology |
| QW | | Microbiology and Immunology |
| QX | | Parasitology |
| QY | | Clinical Pathology |
| QZ | | Pathology |
Medicine and Related Subjects |
| W | | Health Professions |
| WA | | Public Health |
| WB | | Practice of Medicine |
| WC | | Communicable Diseases |
| WD 100 | | Nutrition Disorders |
| WD 200 | | Metabolic Diseases |
| WD 300 | | Immunologic and Collagen Diseases. Hypersensitivity |
| WD 400 | | Animal Poisons |
| WD 500 | | Plant Poisons |
| WD 600 | | Diseases and Injuries Caused by Physical Agents |
| WD 700 | | Aviation and Space Medicine |
| WE | | Musculoskeletal System |
| WF | | Respiratory System |
| WG | | Cardiovascular System |
| WH | | Hemic and Lymphatic Systems |
| WI | | Digestive System |
| WJ | | Urogenital System |
| WK | | Endocrine System |
| WL | | Nervous System |
| WM | | Psychiatry |
| WN | | Radiology. Diagnostic Imaging |
| WO | | Surgery |
| WP | | Gynecology |
| WQ | | Obstetrics |
| WR | | Dermatology |
| WS | | Pediatrics |
| WT | | Geriatrics. Chronic Disease |
| WU | | Dentistry. Oral Surgery |
| WV | | Otolaryngology |
| WW | | Ophthalmology |
| WX | | Hospitals and other Health Facilities |
| WY | | Nursing |
| WZ | | History of Medicine |
