| Abbreviation | Definition |
|---|---|
| LSTRC | Literature Selection Technical Review Committee |
| LTGB | Light Tower and Generator Bureau |
| LTIR | Licensed Trustee in Insolvency and Restructuring |
| LUATC | Life Underwriters Association Training Course |
| LUGH | Linux User Group Hannover |
| LUMA | Lighting Up Media the Arts |
| LUMA | Lighting Up Media & the Arts |
| LWGA | Loudoun Wine Growers Association |
| LYA | Lao Youth Association |
| M&V | Mission Vision |
| M&V | Mission & Vision |
| M/H | Man Hour |
| MA | Marketing Association |
| MAA | Mathematics Association Of America |
| MAA | Myositis Association Of America |
| MAAA | Malta Amateur Athletics Association |
| MAAA | Metro Association For Adapted Athletics |
| MAAA | Mexican American Alumni Association |
| MAAA | Model Aeronautical Association Of Australia |
| MAAM | Metric Advancement Association of Madison |