| LCMS | Lake City Middle School 
| Others |
| LCMS | Lane Change Management System
| Others |
| LCMs | Lane Change Maneuvers
| Others |
| LCMS | Langston Chapel Middle School
| Others |
| LCMS | Laser Counter Measures System
| Others |
| LCMS | Laser CounterMeasure System
| Others |
| LCMS | Lawton Chiles Middle School
| Others |
| LCMS | Learning Content Management System
| Others |
| LCMS | Learning Content Management Systems
| Others |
| LCMS | Learning Content Managment System
| Others |
| LCMS | Light Control Management System
| Others |
| LCMS | Lindero Canyon Middle School
| Others |
| LCMS | Linear Common Mode Suppression
| Others |
| LCMS | Linear Content Management System
| Others |
| LCMS | Liquid Chromatograph Mass Spectrometry
| Others |
| LCMS | Liquid Chromatography and Mass Spectrometry
| Others |
| LCMS | Liquid Chromatography Mass Spectrometry
| Others |
| LCMS | Local COMSEC Management Software
| Others |
| LCMS | Los Cerritos Middle School
| Others |
| LCMS | Los Cerros Middle School
| Others |
| LCMS | Louisa County Middle School
| Others |
| LCMS | Low Cost Modular Spacecraft
| Others |
| LCMS | Lumpkin County Middle School
| Others |
| LCMS | Lutheran Church - Missouri Synod
| Others |
| LCMS | Lutheran Church in Malaysia and Singapore
| Others |
| LCMS | Lutheran Church Missiouri Synod
| Others |
| LCMS | Lutheran Church Missouri Synod
| Others |