SEG may be an acronym for:
- SEG (company), abbreviation for Schmidt Electronic GmbH, a German electronics manufacturer producing goods such as TVs
- SEG Communications (company), UK based distributor of networking hardware
- Special Effects Generator, used in a television studio
- Semaphore Entertainment Group, a pay-per-view company which co-founded the Ultimate Fighting Championship
- Special Escort Group (Metropolitan Police), escort important persons, valuable or hazardous cargoes in London, England
- Special Escort Group (Ministry of Defence Police), protects nuclear materials in transit between United Kingdom military establishments
- Supplementum Epigraphicum Graecum, an annual publication of new ancient Greek inscriptions
- Select Employee Group, a group of people eligible for credit union membership
Read more about SEG: Science, Other Abbreviations and Uses