Operating system defination and types

An operating system may be viewed as an organized collection of software extensions of hardware, consisting of control routines for operating system a computer and for providing an environment for execution of programs.

Other programs rely on facilities provided by the operating system to gain  access to computer system
 such as files and input/output devices. Programs usually invoke services of the operating system by means of operating system call.

Types of operating system:- 

Microsoft :-   1. window XP
                      2. window vista
                      3. window 7
                      4. window 8
                      5. window 8.1
                      6. window 10 etc.

Linux/Unix:-    1.redhat
                         2.kali5.
                         3. parrot
                         4.ubuntu etc.



various types of operating system:-

  1. Desktop system 
  2. Multiprocessor system
  3. Clustered system 
  4. Handheld system
  5. Real-time system
  6. multitasking        


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