Video Conference


It is the procedure of holding conference/meeting/chat over the internet mostly using webcam where participant can see each other on the screen. On the recent days internet has become fast enough to support the speed and capabilities require for holding a video conference. This has enabled the use of technology to the main stream industries and to the common computer users.

With video conference people can communicate with each other with an interactive session as if it is a real one-on-one conversation. Continue Reading

Video Graphic Adapter (VGA)


Video Graphic Array card

This is an adapter that is converts the processed images from the PC processor to the computer monitor. In early PC the adapter was added into the computer as an expansion card, but today`s PC the VGA adapter is integrated into the motherboard.

video graphic card vga

Function of VGA adapter

The main function of the adapter is to convert the processed information from the PC processor to images that can be displayed on the connected monitor. Continue Reading

System Software


System software are used to manage the computer system by ensure it to it optimal. Mostly of the end users don`t interact with the system software because some of them are automated or they require advance knowledge to operate.

Their main characteristic is that they offer features that enable the user to work in an effective and efficient way. They are categorized into two: operating system and utility software. Continue Reading

System Changeover


After acquiring a computer program (system) you are require to change from the old system to the newly acquired system in a process called system changeover. It involves replacing the old system and business processes with new once.

General activities carried out during changeover

Replace old hardware systems with new.

The new system may not be supported by the old hardware system; hence you will be required to replace them with new, i.e. the new system may require a high speed to process information. Continue Reading

Storage Device


Storage device is used to keep a copy of data or information temporally when it is being processed of permanently for future references. They store the data which is used by the computer and the user. The storage capacity is calculated in terms of bytes where 1byte is made up of 8bits (0s and or 1s).

storage device

Storage device are categorized into two main classes: primary and secondary storage hardware. Continue Reading

Social Network


Social network is a platform that people use to connect with each other all over the world to share and communicate with each other. The platform can be used to connect families, professional, friend, people with same believe and all other concept that can bring people together with a commonality.

social network

Uses of social media

  1. Communication

The media are used to communicate between individuals or companies. Companies can post information that their client require and they can get feedback from the customer. Continue Reading

Search Engine


It is a type of computer program that is used to search information in the website. The search engine uses a keyword to try and find the most relevant information on the public website across the internet. Most of the main engines generate what is called natural result of the search but sometime the owner of the search engine can modify the search to suit companies that advertise on their engines.

How search engine operates

Since search engines are met to search the web page they carry out two functions which ensure that they give the most relevant result. Continue Reading



Scanner is an input devices that convert text document or images into softcopy that can be manipulated into the computer. They scan hardcopy of either text or images to convert them mostly into digital images. They use light sensor to do the scanning.

The main function of scanner is to convert images and documents into digital form that can be processed by the computer or other digital devices.

Types of scanner

Scanner can be classified into 2 categories:

  1. Handheld scanners

The user holds the scanner and passes it along the document or image that they are scanning. It should be move slowly to capture all the details and to get the best quality. They are portable, cheaper than flatbed and they are mostly met for home use or scanning of small documents.

handheld scanner

  1. Flatbed scanners

Instead of user holding the document on their hand, the document is placed Continue Reading



It is an optical device (which means it deals with light) which project image. It enlarges the image size. The images can be static like data or graphical or moving image (video). Projector does this by passing the image to be projected through a lens which enlarges the image. In this article we discuss the digital projector.


Functions of a projector

  1. Presentation

There main use is for presentation of content. The presentation can be done by different people in different professionals. Continue Reading



It is an output device that is used convert soft copy or what you see to screen to hard copy (paper). It output the information on the screen to a sheet of paper. Most of today`s printer are connected to the system unit by a USB and even other are wireless. Earlier computer though used a different interface to connect. Continue Reading