| Owning | Item | Volume | ||
| Location | Form/Format | Count | Equivalence | Notes |
| McHenry | Volumes | 172,601 | 173,098.92 | |
| Newspapers | 3 | 37.50 | ||
| Mono CD-ROM Disks | 1 | 1.00 | ||
| Microprints | 127 | 238.36 | Boxes | |
| Microfilm Reels | 2,273 | 617.67 | ||
| Microfiche | 31 | 484.37 | Items are multi-fiche units | |
| Maps | 11 | 5.73 | ||
| Floppy Disks | 1 | 1.00 | ||
| Media Center | Audiodiscs | 8,421 | 1,830.64 | |
| Science | Volumes | 58,349 | 58,349.00 | |
| Videotapes | 60 | 60.00 | ||
| Serial CD-ROM Disks | 5 | 5.00 | ||
| Multi-media Kits | 2 | 2.00 | ||
| Maps | 4,266 | 3,661.77 | 1,261 sheets; 3,005 volumes | |
| Floppy Disks | 159 | 159.00 | ||
| Special Collections | Volumes | 12,907 | 12,915.38 | |
| Videotapes | 21 | 398.92 | Cartons | |
| UC Archival Manuscripts | 757 | 9,579.38 | 672.6 manuscript units | |
| Personal Manuscripts | 1,321 | 12,710.29 | 1,115.1 manuscript units | |
| Other Pictorial Material | 3 | 9.38 | Wrapped items | |
| Other Archival Material | 1,253 | 7,446.17 | 685.9 manuscript units | |
| Motion Pictures | 5 | 110.00 | Cartons | |
| Microfilm Reels | 197 | 53.53 | ||
| Total | 262,774 | 281,775.01 |