Single User Operating System

By | September 5, 2021

What is Single User Operating System?

  • In single user operating system, only a single user can access the computer at a particular time.
  • The computer, that is based on this operating system, has only single processor and executes only a single program at all the time.
  • This system provides all the resources such as CPU, I/O devices to a single user at all the time. Single user operating system is of two types:
  1. Single user, single-tasking operating system
  2. Single user, multi-tasking operating system

Single User Operating System

  • The Single User, Single-tasking operating system as a single user to execute one program at a particular time. For example, MS-DOS and Palm OS for Palm handheld computers are single user, single tasking OS.
  • The Single User, Multi-tasking operating system allows a single user to execute multiple programs at a same time. For example, a user can perform different tasks such as making calculations in Excel sheet, printing a word document and download a file from the internet at the same time.
  • The main disadvantage of this operating system is that CPU sits idle for most of the time and is not utilized to its maximum.


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