EID
# EID

EID, an acronym, may refer to:

* Ecological interface design, a framework for designing complex sociotechnical, real-time, and dynamic systems
* Electronic identification, digital systems used for proof of identity
* eUICC identifier, a 32-digit unique identifier of an eUICC eSIM device, representing the identity of a mobile device to a cellular network service provider
* eSIM Identifier, a misnomer for eUICC Identifier
* Emerging infectious disease, an increasingly prevalent infectious disease
* Emotional instability disorder, a psychological condition formerly known as borderline personality disorder
