What is an Operating System

What is an operating system? (cont’d)

•

Abstractions:–

–

Implements processes &

threads

–

Implements virtual memory

& manages memory

–

Provides interprocess

communication (IPC)

–

Implements file system.

Manages persistent storage

of information

•

Controls I/O

•

Implements networking &

communications


•	Definition — Same as
	judicial definition of
	pornography

•	“I cannot define it, but I
	sure can recognize one
	when I see it!”