| MLB | "Mike" LineBacker (Middle LineBacker) 
| Others |
| MLB | M-Line Bus
| Others |
| MLB | MacKimmie Library Block
| Others |
| MLB | Macro Library
| Others |
| MLB | Macro library file (Symphony)
| Others |
| MLB | Main Logic Board
| Others |
| MLB | Majesty Lord Blaster
| Others |
| MLB | Major League Baseball
| Others |
| MLB | Major League Beasts
| Others |
| MLB | Major League Booty
| Others |
| MLB | Major League Bowhunter
| Others |
| MLB | Major League Bullshit
| Others |
| MLB | Major Logic Board
| Others |
| MLB | Make Learning Better
| Others |
| MLB | Make Life Better
| Others |
| MLB | Maple Leaf Baseball
| Others |
| MLB | Maritime Logistics Bornem
| Others |
| MLB | Maritime Lumber Bureau
| Others |
| MLB | Marxist League Baseball
| Others |
| MLB | Marxist Leninist Baseball
| Others |
| MLB | Massive Legal Budget
| Others |
| MLB | Material, Labor, Burden
| Others |
| MLB | Matthew Lee Bowman
| Others |
| MLB | Media Library
| Others |
| MLB | Melbourne, Florida USA
| Others |
| MLB | Metaproducts Language Binary
| Others |
| MLB | Micro-Laryngo- Bronchoscopy
| Others |
| MLB | Middle LineBacker
| Others |
| MLB | Millionaires League Baseball
| Others |
| MLB | Mindless Lame Ballgames
| Others |
| MLB | Mini Land Bridge
| Others |
| MLB | Mini Landbridge
| Others |
| MLB | Minor League Ball
| Others |
| MLB | MINURSO Logistic Base
| Others |
| MLB | Miraculous Lady Bug
| Others |
| MLB | Missing Left Bracket
| Others |
| MLB | Modularen Langsbaukasten
| Others |
| MLB | Mother Love Bone
| Others |
| MLB | Multi Layer Board
| Others |
| MLB | Multi Left Border
| Others |
| MLB | Multi Link Beam
| Others |
| MLB | Multi-Layer Board
| Others |
| MLB | Multiple Library
| Others |
| MLB | Murphy's Law Baseball
| Others |
| MLB | My Life Bits
| Others |
| MLB | My Little Basket
| Others |