Proprietary

Proprietary is an adjective related to property or ownership. It may also refer to:

Proprietary chapel, a chapel that originally belonged to a person, but open to the public
Proprietary church, a church built on private ground by a feudal lord
Proprietary education or For-profit higher education in the United States, educational institutions operated by private businesses
Proprietary colony, an early North American colony granted by the English Crown to one or more proprietors
Proprietary community, a community property owned by a single person or entity
Proprietary company, a form of privately held company in Australia and South Africa
Proprietary eponym or Generic trademark, a trademark or brand name that has become a generic name
Proprietary estoppel, a legal mechanism to acquire rights over property, especially land
Proprietary governor, the governor of a proprietary colony
Proprietary House, a mansion in New Jersey built for the proprietary governor in 1764
Proprietary lock-in or Vendor lock-in, creating customer dependency on a vendor for products and services
Proprietary trading, the practice of trading financial instruments with a firm's own money

In computing[edit]

Proprietary hardware, computer hardware whose interface is controlled by the proprietor
Proprietary protocol, communications protocol owned by a single organization or individual
Proprietary software, software for which the publisher or another person retains intellectual-property rights
Proprietary format, a privately owned digital-file format