| # | Type | Title | Collection | Location | Documents | |
|---|---|---|---|---|---|---|
| 23 | Website | Michael Barrier | no | yes | 27 | |
| 46 | Website | Michael Sporn Animation | no | yes | 1 | |
| 264 | Website | Michigan State University Libraries | no | yes | 0 | |
| 368 | Magazine | Millimeter | no | no | 2 | |
| 851 |  |
Magazine | MIS Newsletter | no | no | 0 |
| 49 | Book | Misc Books | yes | no | 322 | |
| 173 | Misc | Misc Broadcast | yes | no | 22 | |
| 193 | Document | Misc documents | yes | no | 129 | |
| 889 | Misc | Misc Events | yes | no | 0 | |
| 60 | Magazine | Misc Magazines | yes | no | 87 | |
| 48 | Website | Misc Websites | yes | yes | 80 | |
| 727 | Magazine | Model Engineer | no | no | 1 | |
| 896 | Magazine | Model Railroader | no | no | 1 | |
| 213 | Magazine | Modern Maturity | no | no | 2 | |
| 81 |  |
Magazine | Modern Mechanix | no | no | 5 |
| 196 | Website | Modern Mechanix blog | no | yes | 0 | |
| 31 |  |
Podcast | Modern Mouse Radio | no | no | 2 |
| 93 |  |
Magazine | Modern Screen | no | no | 9 |
| 235 | Magazine | Modern Steel Construction | no | no | 4 | |
| 430 | Magazine | Monsanto Magazine | no | no | 3 |
