Difference Between Online Operating System And Real Time Operating System

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We are using both types of systems online and real-time operating systems in today's technological world, both of these systems are used for different purposes, but some people are confused about the differences. Let's look at the differences in-depth, as well as their benefits and drawbacks.

What is an Online Operating System?

Online operating systems are those that are linked to the internet or operate through the internet. For example, online gaming platforms, conversing on various social media platforms, etc. Today, there are a variety of online-based apps solving various problems and are easily accessible to us. Online operating systems are made using web development languages like JavaScript, Ajax, etc., and are deployed on the internet domain to make them accessible to other users.

What is a Real Time Operating System?

Real-time operating systems (RTOS) are employed in situations where a great number of events, most of which are external to the computer system, must be received and handled quickly or under tight deadlines. Industrial control, telephone switching equipment, aircraft control, and real-time simulations are examples of such uses. The term "real-time" refers to systems that respond quickly and do not hang while performing important and heavy tasks. Bank ATMs, traffic control systems, and current computer systems such as the PC and mobile devices are all examples of real-time data processing systems.

Advantages of Online Operating System

  • Online operating systems allow us to exchange information throughout the world easily and immediately.
  • When compared to real-time systems, online systems are less expensive, and anybody with access to the internet may utilize these systems.
  • Many online systems, such as booking systems or e-commerce platforms, have excellent response times.
  • As the online operating systems don't require a lot of hardware, they can be utilized with the least basic gears.

Disadvantages of Online Operating System

  • There are instances when a significant amount of data is retrieved or transmitted through online operating systems, at times these systems may become unable to manage the huge amount of data.
  • Online operating systems cannot be utilized for high-priority jobs as they do not provide in-time information, which means they lag behind real-time systems.
  • Performance issues can arise as the online system cannot handle a huge amount of data simultaneously.

Advantages of Real Time Operating System

  • These are the quickest systems accessible, thus they're employed in high-priority tasks like rocket launchers, military communications, etc.
  • These systems respond instantly, do not lag, and deliver real-time information and services.
  • Real-time systems are the bedrock of sophisticated technology in domains such as telecommunication, pattern recognition, etc.
  • The performance of a real-time operating system is high quality as it can handle a large amount of data simultaneously.

Disadvantages of Real Time Operating System

  • Real-time operating systems are sometimes very expensive to assemble, so they are not available to everyone.
  • To utilize real-time systems we need a lot of high-quality system resources, including software and hardware.
  • A real-time operating system requires daily data backups depending on transaction frequency and also to keep a track of the most recent data transactions.

Difference between Online Operating System and Real Time Operating System

Online Operating SystemReal-time Operating System
These are the type of systems that update or exchange information by accessing the internet.These are the type of systems that work on a priority basis by using a sense of physical time to transfer data from one system to another.
All the online operating systems are not considered real-time operating systems.All the real-time operating systems are considered online operating systems.
It's utilized to do less important tasks as it can lag during the tasks.It's utilized to perform heavy and high-priority tasks as it has more power.
Online systems are designed for a variety of applications, including networking, entertainment, etc.Real-time systems are designed for specialized reasons, such as national security systems.
An example of an online system is sending an email.An example of a real-time system is withdrawing cash from an ATM.


  • In today's technological world, we are using both types of systems online and real-time operating systems.
  • Online operating systems are those that are linked to the internet or operate through the internet.
  • Real-time operating systems are those which respond quickly and do not hang while performing heavy tasks.
  • The online operating system provides easy access to e-commerce websites, online games, etc.
  • The real-time operating system provides easy operation of defense and national security issues.