Chess Abbreviations and Acronyms
- MCCMonroeville Chels Club
- MCCMililani Chess Club, Mililani, Hawaii
- MCCMonroeville Chess Club
- MCIMckenzie Chess Institutetute
- MCIMcKenzie Chess Institute, Milpitas, California
- MCISMansfield Chess In the Schools, Mansfield, Texas
- MCLMaharashtra Chesstleague
- MCLCMata Chess League Co-ed, Concord, California
- MCOModern Chess Openings
- MDLMMichael De La Maza
- MFLMoves for Life
- MSCAMinnesota State Chess Association
- MSJEMission San Aose Elementary
- MSOMind Sports Olympiad
- MSOMind Sports Organisation
- NANational Arbiter
- NAGNumeric Annatation Glyphs
- NAGNumeric Annotation Glyph
- NAGSNumeric Annotation Glyphs
- NCNode Counter
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