| Rank | Abbreviation | Meaning |
|---|
| ***** | MCDL | Motor Control Development and Learning
| |
| **** | MCDL | Master Control Document List
| |
| *** | MCDL | Marine Corps Distance Learning
| |
| ** | MCDL | Multi-Channel Data Link
| |
| ** | MCDL | Mini Club De Liemers
| |
| ** | MCDL | Monroe College Distance Learning
| |
| ** | MCDL | Minority Carrier Diffusion Length
| |
| ** | MCDL | Medina County District Library
| |
| ** | MCDL | Multi Client Data Library
| |
| ** | MCDL | Model Composition Definition Language
| |
| * | MCDL | Machine Code Detection Location
| |
| * | MCDL | Mohave County District Library (Kingman, AZ)
| |
| * | MCDL | Mechanical Component Development Lab
| |
| * | MCDL | Miguel de Cervantes Digital Library
| |
| * | MCDL | Mill City Dart League
| |
| * | MCDL | Monroe County District Library (Woodsfield, OH)
| |
| * | MCDL | Modular Chemical Descriptor Language
| |
| * | MCDL | Mason County District Library
| |
| * | MCDL | Maryland Citizens Defense League
| |
| * | MCDL | Multi Client Data Licenses
| |
| * | MCDL | Montgomery County Dive League
| |
| * | MCDL | Montgomery County Diving League
| |