The Rockefeller Library houses the Hecker Training Room. If you have trouble finding a specific call number, please ask at the service desk.
Call Numbers & Collections:
| A | General | Level 2 |
| B | Philosophy, Psychology, Religion | Level A |
| C | History-Auxiliary Science | Level 3 |
| D | History (General, Old World) | Level 3 |
| E-F | History (North and South America) | Level 3 |
| G | Geography, Anthropology | Level 3 |
| H | Economics, Sociology | Level 4 |
| J | Political Science | Level 4 |
| K | Law | Level 4 |
| L | Education | Level 4 |
| N | Fine Arts | Level A |
| P-PH | Western Language and Literature | Level B |
| PJ-PL | Non-western Language and Literature | Level 3 |
| PM-PZ | Western Language and Literature | Level B |
| Q | Science | Level 4 |
| R | Medicine | Level 4 |
| S | Agriculture | Level 4 |
| T | Technology | Level 4 |
| U | Military Science | Level 4 |
| V | Naval Science | Level 4 |
| Z1-1999 | Library Science & Bibliography | Level 2 |
| Z2000-8999 | Bibliography (Regular & 1-Size) | Level A |
| Z1-Z8999 | 2-Size Zs: Humanities Reading Room | Level A |
| 1-SIZE, 2-SIZE, and 3-SIZE (oversized) items in the Rockefeller Library are shelved in separate areas. Check the stack directories on each floor for the range location. |
Offices & Services:
| Circulation Department | Level 1 |
| Computer Cluster | Level 2 |
| Wernig Graduate Student Reading Room & Study Center | Level 1 |
| Copier | Level 2 |
| Digital Scholarship Studio | Level 1 |
| Digital Scholarship Lab | Level 1 |
| Diversions, Popular Reading Collection, Sorenson Reading Room | Level 1 |
| East Asian Collection (Chinese, Japanese, Korean) | Level 3 |
| Hecker Training Room | Level 1 |
| Microforms and Microform Indexes, range 1 | Level B |
| Periodicals, ranges 50-51 | Level 2 |
| Reference, ranges 46-49 | Level 2 |
| Reserve Collection, ask at Circulation | Level 1 |
| Book Scanner | Level 2 |
| Shelving Center | Level B |