Assertion: proprietary operating system | /r/HasProperty | controlled in every detail
Facets:
value: usually
type: DEGREE
value: by a single company
type: OTHER
Source sentences:
text: Unlike proprietary operating systems, which are usually controlled in every detail by a single company, Linux has a standard consistent core (called the "kernel") around which many varieties (known as "distributions") have been produced by various companies and organisations.