Operating System :-  It is a system software which provides an interface between computer user and hardware with the help of application software.

Interface :- A place/ Panel which two or more than element can interacts to each other.

 There are two types of  Interface :-
1. Command Line Interface
2. Graphical Line Interface
Goals of OS
1. Maximize Resource Utilization 
  • Minimize CPU response time
  • Maximize memory (RAM) utilization
2. Ease of Use 


Functions of OS 
  1. Processor Management
  2. Memory Management
  3. Disk Management
  4. File Management
  5. I/O Management
  6. Security
  7. Networking