title: ESI
text: # ESI
  
  ESI or Esi may refer to:
  
  ## Science and technology
  
  * Earth Similarity Index
  * Electrospray ionization, a technique used in mass spectrometry
  * Environmental Seismic Intensity scale
  * Essential Science Indicators, by Clarivate
  * Electronic supplementary information, in scientific publications; for example see coordination polymerization
  
  ### Computing
  
  * Edge Side Includes, a markup language
  * Electronically stored information (Federal Rules of Civil Procedure)
  * Enclosure Services Interface, a computer protocol used in SCSI enclosures
  * Enterprise Southbridge Interface, a motherboard interface
  * ESI register, in the x86 microprocessor architecture
  
  ### Medicine
  
  * Electromagnetic source imaging
  * Emergency Severity Index, a triage algorithm
  * Epidural steroid injection
  
  ## Organisations
  
  * Electro Scientific Industries, an American high-technology company
  * Employees' State Insurance, in India
  * Ernst Strüngmann Institute, a German research institute
  * Erwin Schrödinger International Institute for Mathematical Physics, in Austria
  * Escadron spécial d'intervention, now the Belgian Federal Police Special Units
  * European Stability Initiative, a think tank
  * ITT Educational Services, owner of the defunct ITT Technical Institute
  
  ## People
  
  * Esi Awuah, Ghanaian academic
  * Esi Benyarku (born 1976), Canadian sprinter
  * Esi Edugyan (born 1978), Canadian novelist
  * Esi Sutherland-Addy, Ghanaian academic
  * Esikeli Tonga (born 1988), Australian rugby league player
  
  ## Other uses
  
  * Enhanced Station Initiative, of the New York City Subway
  * Enlightened self-interest, a philosophy in ethics
  * Environmental Sustainability Index
  * Ethical Sensory Introvert, in socionics
  * Export substitution industrialization
  * Early supplier involvement, an aspect of supplier integration in supply chain management; see Design for X
  * North Alaskan Inupiatun language (ISO 639-3 code)
  