The computer system consists of two main components which are hardware are software.Hardware are the physical (tangible) parts of the computer that can be seen, touched and carried about.

Operating systems, usually referred to as OS are a type of system software which provide a systematic way of managing and organizing the computer’s resources. They are the first set of programs that is loaded on a computer in order to ensure its smooth operation.

Computer memory is a storage location where data/information are kept or stored. All data, information, text, numbers, audio, video etc are converted into 0’s and 1’s and stored in different types of storage in order to be processed by the computer CPU. The storage devices include flash drive, hard disk and compact disc. Data is usually expressed in bytes, kilobytes, megabytes, gigabytes, etc. and we have various units of storage.

A computer is unable to do anything on its own, it requires instructions to do something. These instructions enable the computer to accomplish tasks. A set of instructions is called a program. Programming languages are used to develop programs.Computer programming is a way of giving computers instructions about what they should do next. These instructions are known as code, and computer programmers write code to solve problems or perform a task. The end goal is to create something: that could mean anything from a web page to a piece of software, or even just a pretty picture.

BASIC is one of the major languages used writing computer programs. The BASIC language has many dialects that are unique to certain computers. Even with IBM and compatible microprocessors, there are several dialects such as Microsoft BASIC, GW-BASIC, and from MS-DOS version 5 we have QBASIC. QBASIC has been the accepted standard since 1975 when Bill Gates and Paul Allen developed it, because of its English-like commands which make it easy to understand.

Computer ethics enables computer users to handle computer resources in an orderly manner. This entails following methods and guidelines to avoid illegal use or abuse of computers and information. It also involves the conduct and behaviour of the computer operators while operating the computer. Major issues surrounding computer ethics are based on problems arising from the use the internet such as piracy, cyber-crimes etc.

Accident is an undesirable, unwanted and unpleasant occurrence that happens to man unexpectedly causing injury to the person, damage to equipment and environment. It is such a common phenomenon and inevitable in a working environment, hence, there is need to proactively ensure and observe simple safety measures or rules.The computer room should be properly maintained in order to preserve and safeguard the files in the computers. Users of the computer also need to take certain precautions in order to safeguard their health and well-being.

Graphic design is evident all around us, it is seen in countless products and everyday items which utilize it like logos, websites, business cards, advertisements, brochures, billboards, posters, book designs, cartoons, magazine, newspapers, etc. The purpose of graphics is to show information, as well as make an impression. A package is software written to perform a particular task. Graphic images can be created using computers.

Paint is a program used to create drawings on a blank canvas. The drawings can be deposited on the desktop or in other applications if need be. Scanned pictures or photographs can be viewed and edited with a Paint program.

Information and Communication Technology (ICT) has become one of the basic building blocks of modern society. Many countries now regard understanding and mastering the basic skills and concepts in ICT as part of the core education, alongside reading, writing and numeracy.

ICT relies on a wide variety of computing devices such as personal computers, computer networks, robots, etc. There is technology for broadcasting information such as radio, television and satellite-based services. There is also technology for communicating through voice and sounds or images such as aerophone, camera and loudspeakers. ICT uses an array of computer application software that are consistently being developed, from a simple word processor to e-mail and internet applications, to the most sophisticated applications that control rockets sent into space. These are known as ICT gadgets.

The world has come a long way from the era when people had to travel long distances or pay a lot of money just to communicate with or see their family, friends or associates. In recent times, people do not have to go or look too far to acquire knowledge and information, or sell their goods and services. These and other seemingly easy ways of living today are brought about by the internet.

Internet environment is the platform that allows you to browse or surf the Net. Without internet connections, you will not be able to effectively access the internet environment.An internet is a logical collection of networks supported by gateways, routers, bridges, hosts, and various layers of protocols. An internet environment permits different physical networks to function as a single, large, virtual network, and permits dissimilar computers to communicate with each other, regardless of their physical connections.