There are different basic types of processing; namely: Batch processing Real time processing Time sharing processing Demand processing Batch processing In Batch processing, data are gathered over a period of time and the batch of transactions is processed together. It employs sequentially processing technique which consists of processing the first record of the file sequence, […]
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Electro-mechanical Counting Devices These are counting devices that could be operated both electrically and mechanically. Electro-mechanical devices include the following: Speeding Clock Blaise Pascal machine Gottfried Leibniz Machine SPEEDING CLOCK OR CALCULATING CLOCK In 1623 and 1624, reported his design and construction of what he referred to as an arithmetical instrument that he has
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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
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ADVANTAGES OF USING WORD PROCESSING PACKAGES The use of computer allows for neat jobs. It makes typing pleasurable. There is room for corrections such that it does not leave any scar on the document. With the use of computer, text could be formatted to suit the user’s taste. It allows Mail Merging operation thereby relieving
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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
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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.
Rules and Regulations of the Computer Laboratory The following are the rules and regulations of the computer laboratory: Computer room should be kept tidy always by regular cleaning Do not remove or load any software into the computer The security should be very tight to prevent stealing of the equipment. Eating: eating in whatever form
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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,
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THE MONITOR The monitor is an output device used to display information. The monitor is also called Visual Display Unit (VDU). It is similar to ordinary television screen. The output on a monitor is called softcopy. This output is available to the user only for as long as another output has not replaced it. Thus,
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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.
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The Importance of the Computer as a Tool for Data Processing The computer is a very unique electronic device and has certain features and characteristics that distinguish it from other machines. These include: Speed: Computers are very fast; they can perform tens of millions of operations per second. This is necessary for predicting weather forecasts,
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THE KEYBOARD AND TYPES OF KEYBOARD CONTROL KEYS:they are used in line with other keys to instruct the computer to perform specific tasks. They are ctrl, del Esc and Alt. CURSOR- CONTROL KEYS: otherwise known as curdor manipulations keys allow the user to move the cursor to the left, right, up one line and down
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MODERN METHODS OF TRANSMITTING INFORMATION With modern inventions in communication, many ancient methods have been replaced with more efficient modern ways of transmitting information. These include the following: Printing Telephone Global Systems for Mobile communication (GSM) Telex Radio Television Facsimile (Fax) Satellite Internet, etc. Printing Information transmission by printing involves the production of information on
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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
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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
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INTRODUCTION TO WORD PROCESSING PACKAGES A word processing package enables you to type in and manipulate text. It helps you to enter, store, format, copy and print text. It is a software that turns the computer into a sophisticated typewriter. With any type of word processing software, you can produce any kind of document, large
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.
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Data processing is the process of converting data into meaningful information. It involves collection of data or gathering of data. Data processing often refers to the use of computers in commercial applications as distinct from engineering applications. It is also an act of collecting data, assembling them and making them available to the processor in
A System unit also known as a base unit, is electronic circuitry housed within the computer cabinet. It is the part of the micro computer that contains the Central Processing Unit (CPU). THE INTERNAL FEATURES OF THE SYSTEM UNIT Is the main body of a personal computer, typically consisting of a plastic/metal enclosure containing thefollowing:
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
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