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| MAIN CLASS | ALPHABET |
| Generalia | A |
| Philosophy and Religion | B |
| History | C/F |
| Geography | G |
| Political Science | J |
| Law | K |
| Education | L |
| Music | M |
| Fine Arts | F |
| Language and Literature | P |
| Science | Q |
| Medicine | R |
| Agriculture | S |
| Technology | T |
| Military Science | U |
| Naval Science | V |
| Library Science | Z |
| Science | Q |
| Mathematics | QA |
| Astronomy | QB |
| Physics | QC |
| Chemistry | QD |