Course Content
Define Information Technology
Definition and scope of Information Technology.
Understanding the Input Processing Output Storage Cycle
How does your computer turn input into output? We explore the intricacies of Input Processing Output Storage (IPOS).
Evaluating the Relative Merits of Cloud Storage and Local Storage
Analysing the Merits of Various User Interfaces
We discuss the relative merits of the various types of user interfaces.
Tailoring Computer Systems for Specific Purposes
Evaluate the suitability of a given computer system for a specific purpose
Troubleshooting Basic Computer Hardware Problems
Learn the basics of troubleshooting common computer hardware issues.
Distinguishing Between Data and Information
Information from Online Sources
We evaluate the reliability of information obtained from online sources.
Data Validation vs. Data Verification
Computer Fundamentals
    About Lesson

    System software plays a vital role in enabling the smooth operation of computers and other digital devices. It acts as an intermediary between the user and the hardware, facilitating communication and providing essential functionalities. In this article, we will explore the world of system software, including operating systems and utilities, and understand their significance in enhancing our digital lives.

    Definition and Purpose of an Operating System

    An operating system (OS) serves as the backbone of any computing device, be it a desktop, laptop, or smartphone. It acts as a bridge between the user and the hardware, managing resources and enabling the execution of applications. Essentially, it is responsible for controlling and coordinating various system operations, ensuring efficient utilization of hardware components.

    Key Functions of an Operating System

    Process Management

    One of the primary functions of an operating system is managing processes. It allocates system resources, such as CPU time and memory, to different programs and applications, ensuring smooth multitasking and efficient utilization of system capabilities.

    Memory Management

    Operating systems oversee the allocation and deallocation of memory resources to different processes. They ensure efficient memory utilization, optimize performance, and prevent conflicts between programs.

    File System Management

    Operating systems provide a hierarchical structure for organizing and storing files on storage devices. They manage file access, security, and ensure data integrity through features like file permissions and journaling.

    Device Management

    Operating systems act as intermediaries between software applications and hardware devices. They handle device drivers, allowing communication and control over peripherals such as printers, scanners, and network adapters.

    Popular Operating Systems

    Several operating systems have gained prominence over the years, catering to different devices and user preferences. Some notable ones include:


    Microsoft Windows, with its user-friendly interface and widespread compatibility, has become one of the most popular operating systems for personal computers worldwide. It offers a wide range of software and supports a vast ecosystem of applications.


    Developed by Apple, macOS powers the company’s line of desktop and laptop computers. Known for its sleek design and seamless integration with other Apple products, macOS offers a secure and intuitive computing experience.


    Linux is an open-source operating system that has gained significant traction in both desktop and server environments. It provides high customization, robust security, and a vast array of software options through various distributions such as Ubuntu, Fedora, and Debian.