Basics of operating system

Basics of operating system
Definition
“An operating system is a software, or a series of programs, which performs various types of functions in order to manage and organise files.”


Example: MS-DOS, WINDOWS, LINUX, SOLARIES, CPIM etc.
classification

Multi-user Allows two or more users to run programs at the same time.

Multi-tasking Allows more than one program to run concurrently.

Multi-processing Supports running a program on more than one CPU.

Multi-threading Allows different parts of a single program to run concurrently.

Real-time Responds to input instantly.

Functions


responsible for managing all the resources of a computer system.
• Processing the commands.
• Controlling the execution of various programs.
• Managing devices
• Process Management
• Memory Management
• Input/Output Management
• Information Management
• User Interface