Assertion: memory protection | /r/HasProperty | common
Facets:
value: from the 1960s
type: TEMPORAL
value: on many minicomputer systems
type: LOCATION
value: on most mainframes
type: LOCATION
Source sentences:
text: Although memory protection was common on most mainframes and many minicomputer systems from the 1960s, true memory separation was not used in home computer operating systems until OS/2 (and in RISC OS) was released in 1987.