Oe

Oe or OE may refer to:

Linguistics

Old English, the English language spoken in the Early Middle Ages
Œ or œ, a ligature of o and e used in the modern French and medieval Latin alphabets
Oe (digraph)
Open front rounded vowel ({{IPA|ɶ}})
Open-mid front rounded vowel ({{IPA|œ}})
Ö, a character sometimes representing 'oe', appearing in some Germanic, Turkic, and Uralic languages
Ø, a Northern European (Danish, Faroese, Norwegian) or Sami vowel, representing œ, 'oe' diphthong
Ө, a letter in the Cyrillic alphabet

Ōe (surname), a Japanese surname (including a list of people)
Old Edwardian (OE), a former pupil of various schools named after a King Edward or St. Edward
Old Etonian (OE), a former pupil of Eton College, England

International Union of Operating Engineers, a North American trade union
{{lang|pt|Ordem dos Engenheiros}} (OE), a Portuguese order of engineers
Order of Excellence of Guyana, the highest honour of Guyana
Lauda (airline) (former IATA code: OE), a former low-cost airline subsidiary of Ryanair Holdings

Cessna OE Bird Dog, a US Marine Corps observation aircraft later redesignated O-1 along with the similar US Army L-19
°Oe, a measurement on the Oechsle scale for the density of grape must
Oersted (Oe), a unit of magnetic field strength
On30 (Oe), a model railway gauge
OpenEmbedded (OE), a Linux-based embedded build system
Opportunistic encryption (OE), a means to combat passive wiretapping
Outlook Express, a former email program of Microsoft
Ophryocystis elektroscirrha, a parasite of monarch and queen butterflies

Okean Elzy, a Ukrainian rock band
Odakyū Enoshima Line
OE, the aircraft registration prefix for Austrian aircraft
Overseas experience (OE), a New Zealand term for extended working holidays
Overview effect, the cognitive shift experienced by astronauts when viewing Earth from space
Object Explosion, an American animated webseries from 2018-2022
Orient Express, a steam locomotive and an express