| Abbreviation | Definition |
|---|---|
| LSWC | Libre Software World Conference |
| LTSC | Lake Tahoe Summit Classic |
| LTSE | Workshop on Low-Temperature Semiconductor Electronics |
| LWC | Literary Writers Conference |
| LYLC | Latino Youth Leadership Conference |
| MAAC | Metro Atlantic Athletic Conference |
| MAAC | Mid Atlantic Archaeology Conference |
| MAAC | Middle Atlantic Archaeological Conference |
| MAC | Mid American Conference |
| MAC | Midwest Athletic Conference |
| MACC | Mountain Academic Competition Conference |
| MACC | Multi Agency Craft Conference |
| MacHack | Macintosh Hackers Conference |
| MACHVI | International Workshop on Industrial Applications of MACHine Vision & MACHine Intelligence |
| MACNA | Marine Aquarium Conference North America |
| MACNA | Marine Aquarium Conference of North America |
| MACP | Mid America Conference on Preaching |
| MAETC | Michigan Adult Education and Training Conference |
| MAETC | Michigan Adult Education Training Conference |
| MAGLEV | International Conference on MAGLEV and Linear Drives |