| Code | Description | Items |
|---|---|---|
| 020 | Library & information sciences | 22 |
| 021 | Library relationships | 14 |
| 022 | Administration of the physical plant | 0 |
| 023 | Personnel administration | 6 |
| 025 | Library operations | 106 |
| 026 | Libraries for specific subjects | 25 |
| 027 | General libraries | 100 |
| 028 | Reading, use of other information media | 136 |