COMPUTER SOFTWARE Computer software or simply software is any set of instructions that direct a computer to perform specific operations. Computer hardware and software require each other and neither can be realistically used without the other. Software is a program that enables a computer to perform a specific task, as opposed to the physical…
OPERATING SYSTEM (OS) An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system. Examples of Operating System (OS) UNIX and UNIX-like operating system OSX (formerly “Mac OSX”) is a…
Computer hardware is the physical parts or components of a computer, such as the monitor, mouse, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory, mother board, and so on. Examples of computer hardware are Input devices – mouse, scanner, light pen, joystick, etc. Output devices – printer, monitor, plotter,…
COMPUTER SYSTEM A computer system is one that is able to take a set of inputs, process them and create a set of outputs. This is done by a combination of hardware and software. The computer system has one or more inputs to provide data. This data is then processed in some way. The outcome…
Generation of Computers A generation is often referred to the state of improvement in the development of a product. Generation of computer is the advancement of computer technology from time to time. In every generation, the circuitry has become smaller and more advanced than the previous generation. Each generation of computer is characterized by a…
CLASSIFICATION OF COMPUTER BY SIZE There are four classification of computer by size name: (i) Micro computer (ii) Mini computer (iii) Mainframe computer (iv) Super computer (i) Micro Computer: A micro computer is the smallest computer that has a processor on a single silicon chip. Its CPU is a micro processor chip. Examples of…
CLASSIFICATION OF COMPUTER BY TYPES (i) Digital Computer: This is the type of computer in which data are represented in digital or in discrete form, for example, 0, 1,2,3,4,5, etc. It is a type of computer that is used for processing numeric information. Digital computer measures physical quantities by using number to represent quantities. E.g….
COMPUTER ROOM: A computer room is a place where computers and other computer devices are kept for use by students or people. A computer room is a place which provides computer services to students who attend the institution on for use in curricular computer classes. A computer room is a place where computers are kept…
INFORMATION AND COMMUNICATION TECHNOLOGY ICT covers any product that will store, retrieve, manipulate, transmit or receive information electronically in a digital form. E.g. computer, digital television, email Information Technology (I.T) refers to the systems used to store and manage information through the use of technology the use of technologies such as computers. Information System…
ICT AREA OF APPLICATION ICT in Agriculture: The application of ICT in agriculture is increasing important. E-agriculture is an emerging field focusing on the through improved information and communication process more specifically, e-agriculture involves the conceptualization, design, development, evaluation and application of innovative ways to use information and communication technologies (ICT) in the rural domain,…
DIGITAL DIVIDE Digital divide is the gap between people with effective access to digital and information technology and those with very limited or no access at all. It is the gap between those who use computers and the internet and those who do not. It is the unequal access by some members of society to…
INFORMATION AND COMMUNICATION TECHNOLOGY (ICT): Information and Communication Technology is an umbrella term that includes all technologies for the manipulation and computation of information. ICT are the Computation and Communication facilities and features that variously support teaching, learning and a range of activities in education. Communication is the process by which people exchange information…
WEB SEARCH ENGINE: A web search engine is a software system that is designed to search for information on the World Wide Web. To search results are generally presented in a line of results. The information maybe a mix of web pages, images, and other types of files. A search engine is a web-based…
ELECTRO-MECHANICAL COUNTING DEVICES Electro-mechanical counting devices are those counting devices that could be operated both electrically and mechanically These includes the following Blaise Pascal Machine Gottfried Leibniz Machine Joseph Jacquard Loom Charles Babbage Analytical Engine (1) BLAISE PASCAL CALCULATING MACHINE: Blaise Pascal was a French man who invented a new kind of computer in…
ELECTRONIC COUNTING DEVICE Electronic counting devices are the modern computer. The electronic counting devices are as follows: Herman Hollerith Punch Card John Von Neumann Machine Modern Computer. HERMAN HOLLERITH PUNCH CARD In 1881, Herman Hollerith began designing a machine to tabulate census data more efficiently than traditional hand method. Herman Hollerith invented and used…
Early counting devices: Early people developed certain kinds of counting device. As man advanced the counting also become more and more complex. (a) ABACUS: This is the earliest counting device. It was invented 2000 years before it has two section, heaven and earth. An Abacus is a manual aid to calculating that consist of…
A computer system or tool is a collection of hardware and software components designed to provide an effective tool for computer system and are used in everywhere to assist us in the various task we perform. CHARACTERISTICS OF COMPUTERS AS TOOL FOR DATA PROCESSING SPEED: A computer is a very fast device, it can…
Data processing is the collection and manipulation of items of data to produce meaningful information. Data processing is the process of manipulation data to generate information. Data processing methods are techniques used to process/sort different types of data. TYPES OF DATA PROCESSING (1) Batch Processing (2) Online Processing (3) Real-time Processing (4) Multi Programming…
Files and Folders FILE: A file is the common storage unit in a computer. All data are contained in a file. A computer file is a resource for storing information, which is available to a computer program and is usually based on some kind of during storage. FOLDER: A folder is a graphical user interface,…
INFORMATION TRANSMISSION Information transmission is the exchange of information from the sender to the receiver in any form, i.e through voice, data, text and image over any kind of media, hand written medium, etc. There are two methods of information transmission namely: (i) Ancient methods of information transmission (ii) Modern methods of transmitting information …