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Computer Concepts - Types of Operating System

 There are four types of operating systems −

  • Real-time operating system
  • Single-User/Single-Tasking operating system
  • Single-User/Multitasking operating system
  • Multi-User/Multitasking operating system

Real-time operating system

Real-time operating system is designed to run real-time applications. It can be both single- and multi-tasking. Examples include Abbasi, AMX RTOS, etc.

Real-Time OS

Advantages

  • It works very fast.

  • It is time saving, as it need not be loaded from memory.

  • Since it is very small, it occupies less space in memory.

Single-User/Single-Tasking OS

An operating system that allows a single user to perform only one task at a time is called a Single-User Single-Tasking Operating System. Functions like printing a document, downloading images, etc., can be performed only one at a time. Examples include MS-DOS, Palm OS, etc.

Single-User/Single-Tasking OS

Advantages

  • This operating system occupies less space in memory.

Disadvantages

  • It can perform only a single task at a time.

Single-User/Multitasking OS

An operating system that allows a single user to perform more than one task at a time is called Single-User Multitasking Operating System. Examples include Microsoft Windows and Macintosh OS.

Single-User/Multitasking OS

Advantages

  • It is time saving as it performs multiple tasks at a time yielding high productivity.

Disadvantages

  • This operating system is highly complex and occupies more space.

Multiuser/Multitasking OS

It is an operating system that permits several users to utilize the programs that are concurrently running on a single network server. The single network server is termed as "Terminal server". "Terminal client" is a software that supports user sessions. Examples include UNIX, MVS, etc.

Multiuser/Multitasking OS

Advantages

  • It is highly productive as it performs multiple tasks at a time.

  • It is time saving as we don’t have to make changes in many desktops, instead can make changes only to the server.

Disadvantages

  • If the connection to the server is broken, user cannot perform any task on the client as it is connected to that server.

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