EMSA may stand for: Acronyms Egyptian Medical Students' Association Electron Microscopy Society of America former name of the Microscopy Society of America Electrophoretic mobility shift assay Emergency Medical Services Alliance, in Marion County, Florida, United States Emergency Medical Services Authority, In Oklahoma City and Tulsa, OK Emsa (Household goods) manufacturer from Germany Encoding Method for Signature Appendix, a method used in RSA cryptographic signing in PKCS #1 European Magnetic Sensors and Actuators European Maritime Safety Agency European Masters Sports Association, the organization responsible for bidding and placing athletic competitions European Medical Students' Association, in Brussels, Belgium European Multiple System Atrophy study group Location Emsa: a small archaeological site near Tetouan, Morocco