ESI
# 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)
