The System Development life Cycle (SDLC) is a conceptual model used in project management that describes the stages involved in an information system development project from an initial feasibility study through maintenance of the completed application. Various SDLC methodologies have been developed to guide the process involved including the waterfall model (the original SDLC method), […]
System Development life Cycle Read More »
A presentation package is a software package used to display information in the form of slide show. It has three major functions: an editor that allows text to be inserted and formatted, a method for inserting and manipulating graphic images, and a slide show system to display content. Examples of Presentation Packages ® Microsoft PowerPoint
Presentation Package Read More »
TYPES OF TOOL BARS There are two types of tool bars in word processor a) Standard tool bar b) Formatting Toolbar Using the Microsoft Word steps a) Click the start button to bring start menu b) From the pull down menu click on Microsoft word Creating a New document Creating a new document is a
WORD PROCESSING ENVIRONMENT Read More »
Word processing is the art of using computer to type and edit text and graphics in letters, reports, term papers etc. To perform word processing you need a computer set and software called word processor. Word processor enables you to create letter, term paper, newsletter, memo etc and stores those documents electronically on a
BOOTING Booting is a process that starts operating system when the user turns on the computer. Steps in booting a Computer: Put on the switch on the main socket to supply power to the system. Switch on the voltage regulator( known as stabilizer) Switch on the UPS Switch on the monitor before the system unit
BASIC COMPUTER OPERATIONS Read More »
ICT BASED GADGETS ARE THE FOLLOWING Mobile phones Computer Fax machines Automated Teller Machine Dispensing machines Point of Sales Machine-Automated Cash Register(ACR) Radio sets Television sets Mobile Phones: A mobile phone is an electronic device for making calls across a wide geographical area. It is also called cell phones or hand phone. Computer: This
As mentioned in our previous lesson some important application area of ICT are: Video Conferencing Tele conferencing Tele Presence Tele Communicating and Network Tele Computing Messaging Information Search, retrieval and archival Video Conferencing This is a technology whereby two or more people at different locations can see and hear each other at the
Important application area of ICT Read More »
Definition of Data Processing Data processing is the process of producing meaningful information by collecting all items of data together and performing operations on them to extract information. Data processing can also be described as a series of actions or operations that convert or manipulate data into useful information. Data processing involves the systematic recording,
Generations of Computers Generation of computers is the developmental stages that the computer has gone through. There are 5 generations of computers and their accompanying innovations. First Generation – Vacuum Tubes (1940 – 1956) First generation computers were those manufactured between 1940s and 1950s. The computers used the stored program concept. First generation computers were associated
Generations of Computers Read More »
JOHN VON NEUMANN’S MACHINE In 1945, mathematician John von Neumann undertook a study of computation that demonstrated that a computer could have a simple, fixed structure, yet be able to execute any kind of computation given properly programmed control without the need for hardware modification. Von Neumann contributed a new understanding of how practical fast
ELECTRONIC COUNTING DEVICES AND MODERN COMPUTER Read More »
Electro-mechanical Counting Devices JOSEPH JACQUARD’S LOOM The Jacquard machine is a device fitted to a power loom that simplifies the process of manufacturing textiles with such complex patterns as brocade, damask and matelassé. It was invented by Joseph Marie Jacquard in 1804. The loom was controlled by a chain of cards, a number of punched
ELECTRO-MECHANICAL COUNTING DEVICES Read More »
Mechanical Counting and Calculating Devices As a result of the disadvantages of the early counting devices, more advanced mechanical counting and calculating devices were invented. Some of these devices are; Abacus (Chinese) Napier’s Bone (John Napier) Slide Rule (William Oughtred) THE ABACUS The Abacus is made up of beads threaded on iron rods. The
MECHANICAL COUNTING AND CALCULATING DEVICES Read More »
HISTORICAL DEVELOPMENT OF COMPUTERS: EARLY COUNTING DEVICES Definition and Examples of Early Counting Devices Early counting devices are devices that were used in the early days to perform arithmetic operations such as addition of numbers, subtraction and multiplication. These devices were used for the usual barter trade of the early days. Examples of early counting devices are fingers, toes, stones, sticks, pebbles, cowries among others.
HISTORICAL DEVELOPMENT OF COMPUTERS Read More »
Oral method This is one of the oldest methods of transmitting information. It is the era of our great grandfathers when information was sent to people only through the use of the mouth. Drum beating Beating the drums was a simple method of information transmission across distances. Explorers, fearfully making their way through a jungle,
ANCIENT METHODS OF TRANSMITTING INFORMATION Read More »
Definition of Information This is data already processed into a meaningful form for decision making. Information conveys meaning and is useful to one or more people. Definition of Transmission This is the process of transferring something from one location to another location, from one person to another person or from one device to another device.
INFORMATION TRANSMISSION Read More »
Users are a key component in any information system. Therefore, protecting users is just as important as protecting hardware, software and data. The widespread use of computers have led to some important health concerns which are; Repetitive Strain Injury (RSI) Computer related RSI’s are the largest job related injury and illness in the United States
HEALTH CONCERNS OF COMPUTER USE Read More »
Many of us go through our daily routine without noticing how many times we come into contact with computers. Computer technology has become such a part of our daily lives that if it were taken away we would lead radically different lives. Information communication technology involves the use of modern communication channels to convey information.
Meaning of ICT ICT is an acronym which stands for Information and Communication Technology. It can be described as a diverse set of technological tools and resources used to communicate and to create, disseminate, store and manage information. These technologies include; (i) Computer (ii) Internet (iii) Broadcasting technologies (radio and television) (iv) Telephone Uses
ICT APPLICATION IN EVERYDAY LIFE Read More »
Definition of Computer Room Computer room is a room specially created for keeping computers and other peripheral devices. It is also called computer laboratory. In designing this room, the components of a computer room must be put into consideration. Components of a Computer Room Computer system Furniture (computer tables and chairs) Electric surge protector Stabilizer
COMPUTER ROOM MANAGEMENT ETHICS Read More »
THE COMPUTER A computer is an electronic device that can accept data and process data in order to get the required information. The computer receives data through the input device, and it processes the data to generate 1information which it produces and displays through the output device. PARTS OF THE COMPUTER A computer has
PARTS OF COMPUTER KEYBOARD Read More »