Institution
- Marine Biological Laboratory (Woods Hole, Mass.)1
- Marshall University1
- Martin Marietta Corporation1
- Mary Washington College1
- Mass Spectrometry Data Center, National Institute of Standards and Technology, United States Department of Commerce1
- Massachusetts Institute of Technology Practice School 1
- Massachusetts Institute of Technology. Radiation Laboratory1
- Mayfield High School1
- McGovern Institute for Brain Research at MIT1
- McMillan Science Associates 1
- Medical College of Pennsylvania1
- Medical College of Virginia1
- Medical Research Council (Great Britain)1
- Meharry Medical College1
- Melpar, Inc.1
- Merocel Corporation1
- Metal Box Company1
- Metal Hydrides, Inc.1
- Metcalf & Eddy1
- Metropolitan State University1