Ordo Equitum Solis, a French/Italian alternative music band
Oregon Episcopal School, a school in Portland, Oregon
US Office of Emergency Services, a US governmental agency
Order of the Eastern Star, a fraternal organisation
On Every Street, an album by British rock band Dire Straits
Old East Slavic, a language
Old English Sheepdog, a breed of herding dog often kept as a pet
Novell Open Enterprise Server, an amalgam of NetWare and Linux
Occupational Employment Statistics, a US survey
Optical Emissions Spectrometer, an instrument for testing chemical composition of metals
Oes, the plural for the name of the letter "O"
Original Equipment & Service
