Operating System Concepts

Process State As a process executes, it changes state. The state of a process is defined in part by the current activity of that proce...

Process Concept One hindrance to the discussion of operating systems is the question of what to call all the CPU activities. A batch sy...

Processes Early computer systems allowed only one program to be executed at a time. This program had complete control of the system, an...

Real-Time Systems Another form of a special-purpose operating system is the real-time system. A real-time system is used when there are...

Distributed Systems A recent trend in computer systems is to distribute computation among several processors. In contrast to the tightl...