An object-oriented operating system is an operating system that internally uses object-oriented methodologies.
An object-oriented operating system is in contrast to an object-oriented user interface or programming framework, which can be placed above a non-object-oriented operating system like DOS, Microsoft Windows or Unix.
It can be argued, however, that there are already object-oriented concepts involved in the design of a more typical operating system such as Unix. While a more traditional language like C does not support object orientation as fluidly as more recent languages, the notion of, for example, a file, stream, or device driver (in Unix, each represented as a file descriptor) can be considered a good example of object orientation: they are, after all, abstract data types, with various methods in the form of system calls, whose behavior varies based on the type of object, whose implementation details are hidden from the caller, and might even use inheritance in their underlying code.
Famous quotes containing the words operating and/or system:
“I think there are innumerable gods. What we on earth call God is a little tribal God who has made an awful mess. Certainly forces operating through human consciousness control events.”
—William Burroughs (b. 1914)
“We recognize caste in dogs because we rank ourselves by the familiar dog system, a ladderlike social arrangement wherein one individual outranks all others, the next outranks all but the first, and so on down the hierarchy. But the cat system is more like a wheel, with a high-ranking cat at the hub and the others arranged around the rim, all reluctantly acknowledging the superiority of the despot but not necessarily measuring themselves against one another.”
—Elizabeth Marshall Thomas. “Strong and Sensitive Cats,” Atlantic Monthly (July 1994)