SEN

SEN may refer to:

Technology

 * Small extension node
 * Software Engineering Notes, a publication by the Association for Computing Machinery
 * Sony Entertainment Network, a digital media delivery service

Other uses

 * Seddon railway station, Melbourne
 * Senegal (the ISO 3166-1 alpha-3 country code)
 * Sports Entertainment Network, radio network in Australia
 * 1116 SEN, a sports radio station in Melbourne, Australia owned by Sports Entertainment Network
 * London Southend Airport (IATA airport code)
 * Special educational needs
 * State Enrolled Nurse