SIE
SIE might be an acronym or abbreviation for:
- Servicio de Inteligencia del Ejército, the Argentine Army's intelligence agency
- Serviciul de Informaţii Externe, Romanian Foreign Intelligence Service
- Society of Industrial Engineering, an organization of BS Industrial Engineering students of UPHSD - Calamba
- Speciaal Interventie Eskadron or Special Intervention Squadron, the former name of the Belgian police's counter-terrorism unit
- Staten Island Expressway
- Scottish Institute for Enterprise, a government funded body promoting enterprise in Scottish Higher Education Institutions
- Serial Interface Engine, which runs the USB 2.0 protocol for a USB device
- Synthetic Immersive Environment, an engineered 3D virtual spaces that integrate online gaming aspects
- Sustainability Information Exchange Platform, web-based (social) platforms to exchange recent insight from sustainability research