Introduction to Operating System

What is an Operating System?

• Operating system is a system software which is required in order to run application programs and utilities. It perform interaction between application programs and all the hardware of the computer. 
• Examples of operating system are UNIX, MS-DOS, Windows-NT/2000, OS/2, MS-Windows - 98/XP/Vista, android and Mac OS etc.

Different-2 Operating Systems

• A computer system has many resources (hardware and software), which are required r to complete different-2 task. 
• Input / output equipment, memory, file storage space, CPU etc. are the most frequently needed resources. 
• The operating system serves as manager of the above-mentioned resources and assigns them to specific programs and users whenever appropriate to perform a specific function. 
• Operating system work as resource manager i.e. it can manage the resource of a computer system internally or externally. The resources are processor, memory, files, and I/O devices. 
• In simple terms, an operating system work as interface between the user and the hardware/machine.

Related topics to "Overview of Operating Systems"

1. Definition of Operating Systems.
2. Types of Operating Systems.
3. Operating System Services.
4. User operating system interface.
5. System Calls and Types of System Calls.
6. System Programs.
7. Operating System Structure.
8. Virtual Machine.
9. Benefits of Virtual Machine.

Evolution of Operating Systems
Types of Operating Systems