# Eastern Mountain Sports , an outdoor retailer
# Edinburgh Mathematical Society
# Electronic Music Studios (London) Ltd , manufacturers of synthesisers
# European Monetary System , 1979
# European Mathematical Society
# Electromagnetic Spectrum
# Ethyl Methanesulfonate (or methanesulfonic acid ethyl ester), a mutagen
# Electronics Manufacturing Services
# Electronic Muscle Stimulation
# Element Management System , telecommunications
# Expanded Memory Specification
# Energy Management System
#Engine Management System, aka Electronic Control Unit
# Enhanced Messaging Service (application-level extension to Short Message Service (SMS) for mobile phone)
# Electronic Meeting System (mobile worker applications enabled by Groupware )
# Ems (Eems) — a river in northwestern Germany and northeastern Netherlands.
# River Ems — a river with its mouth at Emsworth, Hampshire
# Emergency Medical Services
# Eosinophilia-myalgia Syndrome
# Electronic Muscle Stimulation
# Environmental Management System
# Enterprise Messaging System
# European Macroseismic Scale
# Express Mail Service
#''Electronic Manual Special'', a sporting version of Saab 99 automobile
# EMS Group or Ems-Chemie
# Environmental Media Services
# Early Music Shop
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