An operating system is the program that runs the machine and everything on it. Update the operating system.
It decides which program gets the processor and the memory, which is most of what a computer does. An operating system that is not updated is the commonest way a machine is broken into.
1nounoperating systemThe program that runs the machine and everything on it.
“The operating system had not been updated in four years.”
operating system is a program.
The term dates from the 1950s, when machines first ran more than one program.
From operating + system. First use appears c. the 1950s.
Etymology from Wiktionary, CC BY-SA
Practised in Computing & Code