Windows drive letters are a limited resource that must be carefully managed on larger networked systems. These assignments can be used to standardize drive letters for FHC patron systems.
| DRIVE | RESOURCE | COMMENT |
| A: | 3.5" Floppy | |
| B: | allocated to 5.25" Floppy | |
| C: | system: primary | system backup partition shares this assignment |
| D: | data: swap file | Windows swap file |
| E: | data: temp | Temporary Internet and data files |
| F: | data: archive | |
| G: | reserved for drive partition | |
| H: | reserved for removable drive | |
| I: | reserved for removable drive | |
| J: | reserved for mapped drive | |
| K: | FHLC | dynamic mapping via WSH script |
| L: | Freedman's Bank | dynamic mapping via WSH script |
| M: | PRF | dynamic mapping via WSH script |
| N: | FS: AF | dynamic mapping via bat file¹ |
| O: | FS: FHLC | dynamic mapping via bat file |
| P: | FS: IGI | dynamic mapping via bat file |
| Q: | FS: MI | dynamic mapping via bat file |
| R: | FS: SCR | dynamic mapping via bat file |
| S: | FS: SSDI | dynamic mapping via bat file |
| T: | FS: IGIA | dynamic mapping via bat file |
| U: | reserved for user's network data | |
| V: | patron data | |
| W: | reserved for drive | |
| X: | reserved for drive, e.g. shared CD | |
| Y: | CD drive | |
| Z: | Zip drive |
¹FS drives can be dynamically mapped via a batch files that execute when FS is opened. This assures that shared resources are available and allows drive letters to be reused.