What does EMSA stand for?

Eastern Marathon Swimming Association (EA)

Electrician's Mate, Seaman Apprentice - Navy rating

Electronics Material Support Agency (SAUS)

Electronics Materiel Support Agency - Army

Electron Microscope Society of America (SAUO)

Electron Microscope Surface Area (PDAA)

Electron Microscopy Society of America (EA)

Electrophoretic Mobility Shift Assay - Analytical biochemistry

Eugene Meylan, SA

European Marine Step Association (SAUS)