What is operating system?
An operating system is a collection of system programs that controls and
co-ordinates the overall operations of a computer system. A computer needs an
operating system to do work. Without operating system, a computer is like a car
with no fuel.
Functions performed by the operating system:
The main functions performed by the operating system are;
1. Manage Hardware Resources
2. memory management
3. Load and Execute Programs
4. Data Security
5. Providing Interface to the Users