This is an adapter that converts the processed images from the PC processor to the computer monitor. In early PC the adapter was added to the computer as an expansion card, but in today`s PC, the VGA adapter is integrated into the motherboard. Functions of video graphic adapter (VGA) The main function of the adapter…
BIOS stands for Basic Input Output System and is also known as System BIOS. It is a piece of software stored in ROM flash memory called Complementary Metal Oxide Semiconductor (CMOS) which is an EPROM. BIOS carries the basic instructions that instruct the computer on how to boot and from where. It is a firmware…
The storage device is used to keep a copy of data or information temporally when it is being processed, or permanently for future reference. They store the data which is used by the computer and the user. The storage capacity is calculated in terms of bytes where 1 byte is made up of 8 bits…
Output devices are used to outputting of the information that has been processed from the computers. Like input devices, they are connected to the computer using various connectors like USB, VGA cables, wireless, etc. The main function of the output devices is they allow users, applications, and other devices to communicate. Communication involves the display…
A computer mouse is a pointing input device that is used to click icons on a computer. It is connected to the computer by a cable or using wireless technologies. They are categorized as pointing devices because mostly they are used to point to a position on the screen to execute commands. A mouse function…
Information System has been defined in so many ways by different scholar and sources. To define it simply it is an integration of various components that are coordinated together to enable managers to perform their functions more effectively. They are used to enhance decision-making in the organization, from structured, and semi-structured to non-structured decisions. The…
Computer hardware is the physical tangible part of a computer. They comprise the main part of a computer both internal and external or peripherals. The main characteristic of hardware is it can be seen, felt, and even touch, unlike computer software. The computer hardware is categorized into input, processing, storage, output, and communication devices. Each…
The search engine is a type of computer program that is used to search for information on the internet. The search engine uses a keyword to try and find the most relevant information on the internet. Most of the main engines generate what is called a natural result of the search but sometimes the owner…
An overhead projector (OHP) is an output device that enlarges and projects images into a bigger surface. The images can be static, like data, graphical, or moving images (video). The projector does this by passing the image to be projected through a lens that enlarges the image. Read more on how projectors work. Types of…
Computers are designed for different purposes and to function in a certain way. This gives the bases of how computers can be grouped together using different factors to classify them. The classification overlaps each other such that a computer can be in more than one category. There are four main classifications of computers where each…