[Edit]

top

O.C. (rapper), member of the Diggin' in the Crates Crew and the Crooklyn Dodgers

the Officer Commanding of a military unit

Officer of the Order of Canada (post-nominal letters)

---

top

Places

Oakland County, Michigan
Ocean City
Orange County, California: a county south of Los Angeles; population about 3,000,000; home to such cities as Anaheim, Huntington Beach, Newport Beach, San Juan Capistrano, and San Clemente; and the setting of a popular television program (see below).
Oregon City, Oregon

---

top

Things

Oakwood College, a college in northern Alabama, USA, affiliated with the Seventh-day Adventist Church
Obsessive-compulsive disorder (more common written form OCD)
The O.C., American television show set in Orange County, California.
OC Spray, see Pepper spray
Occitan language, spoken in southern France
Oklahoma Christian University
Oleoresin Capsicum or Oleoresin Capsaicin, the active ingredient in pepper spray and OC gas
openCanvas, an art program
Operation Completion
Optical Carrier levels in the SONET fiber-optic network specification
Optics Communications, a journal published by Elsevier
Oral contraceptives
Original Campaign, in the context of computer games (in other words, the default single player campaign that came with the game)
An Original character in fan fiction
OxyContin
Overclocking
PGA Express IATA airline designator

---

top

Ideas

Organization Change; an associated field to Organizational Development
"out of commission" (usually written as o/c)
"out of control"