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.
Computer Fundamentals
    About Lesson

    There are several types of computer systems, each with different processing speed, storage, and physical size. Here is a breakdown of some of the major types:



    Supercomputers are among the most powerful computers available, designed for high-performance computing and complex computations. They are typically used for scientific research, weather forecasting, and other large-scale applications that require massive amounts of processing power. Supercomputers like Cray are known for their ability to perform complex calculations at incredibly fast speeds. They can have multiple processors, massive amounts of RAM, and storage capacity in the petabyte range.

    Image of Cray-1 Supercomputer at the Magnetic Fusion Energy Computer Center in May 1978.



    Mainframes are large, powerful computers that can handle a vast amount of data processing and storage. They are often used by large organizations such as banks, airlines, and government agencies to run critical applications and store large amounts of data. Mainframes such as the IBM zEnterprise System can have multiple processors, extensive amounts of RAM, and storage capacity in the terabyte range.


    Desktop Computers

    Desktop computers are the most common type of computer used by individuals and businesses. They are designed for general-purpose computing and come in various sizes and shapes. Desktop computers typically have a single processor, a moderate amount of RAM, and storage capacity that can range from a few hundred gigabytes to several terabytes.


    Mobile Devices

    Mobile devices such as smartphones and tablets are designed for on-the-go use and portability. They typically have a smaller form factor than desktop computers and are powered by battery. Mobile devices have become increasingly powerful in recent years, with processors and RAM that can rival some desktop computers. Storage capacity on mobile devices can range from a few gigabytes to several hundred gigabytes.


    Embedded Devices

    Embedded devices are specialized computer systems that are designed to perform a specific task. Examples include answering machines, digital cameras, and smart appliances. They are typically small, low-power devices with limited processing power and storage capacity.


    In summary, computer systems can vary significantly in terms of processing speed, storage, and physical size. Supercomputers and mainframes are known for their high processing power and storage capacity, while desktop computers are general-purpose machines designed for everyday use. Mobile devices are highly portable and powerful, and embedded devices are specialized systems designed for a specific task.