- Secure Electronic Transaction , a protocol used for credit card processing,
- Simulated Emergency Test , an Amateur radio training exercise,
- Single-Electron Transistor , a device to amplify currents in nanoelectronics
- Society For The Eradication Of Television
- South Eastern Trains now run by Southeastern (train Operating Company) , a public-owned rail company operating in South East England
- Stock Exchange Of Thailand , a national stock exchange of Thailand
- SET Index , an index for Stock Exchange of Thailand
- Study Of Exceptional Talent , a program for profoundly gifted students
- Single-Ended Triode , a type of electronic amplifier
- School Of Engineering Technology
|
