OSS
Initialism of Office of Strategic Services (a United States intelligence agency formed during World War II).
Proper noun
- Initialism of Office of Strategic Services (a United States intelligence agency formed during World War II).
Noun
- Initialism of open-source software.
- Initialism of out-of-school suspension.
- Initialism of operations/operational support system.
- Initialism of over-the-shoulder shot.