PRELIM COMPUTER What is a Computer? A computer is an electronic machine that can be programmed to accept data (input)‚ process it into useful information (output)‚ and store it in a storage device for future use Characteristics of a Computer •It’s a machine. •It is electronic. •It is automatic. •It can manipulate data. •It has memory •It has logical function Capabilities of a Computer • Speed • Accuracy • Repetitiveness • Storage • Programmable Limitations of a Computer • Cannot operate without
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Computer Networks NETWORKING CONCEPTS Network A network is basically an interconnection of various points to make a connected system e.g Road‚ Telephone‚ Social Data Network A computer network therefore refers to an interconnection of computers and other peripherals by use of a communication link Peer to Peer Networks In a peer-to-peer network‚ all computers are considered equal; they all have the same abilities to use the resources available on the network. Peer-to-peer networks are designed
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Effect of computer addiction Computer addiction‚ our world is surrounded by technology and we use technology to almost everything‚ our world has gotten so used to tehcnology around us we cannot imagine a life with it‚ though it can come handy it still has its negative effects. Computer addiction is common nowadays beacuse we cant imagine living a life without technology‚ we use computers for almost everything.Parants usually buy their kids computer to study but teenagers often find a
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Horses Computer viruses are man-made program or a piece of code which can load onto your computer without your knowledge and cause damage to your computer system. The dangerous part of the computer viruses is they are attached to a file or program‚ which means the computer viruses will not running until you click the file or program‚ and even more dangerous type of viruses is one capable of transmitting itself across networks and bypassing security system. Worms are similar to computer viruses
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The History of the Computer Long before computers were invented‚ humans realized the need for them. The history of the Computer started about 2000 years ago with the abacus. It is a wooden rack holding two horizontal wires with beads strung on them and was one of the best calculating machines until the seventeenth century (PBS‚ 1). In 1835‚ English inventor‚ Charles Babbage came up with the idea of the Analytical Machine‚ a general purpose‚ fully programmed-controlled‚ automatic mechanical digital
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Computers and Society The decade of the 1980’s saw an explosion in computer technology and computer usage that deeply changed society. Today computers are a part of everyday life‚ they are in their simplest form a digital watch or more complexly computers manage power grids‚ telephone networks‚ and the money of the world. Henry Grunwald‚ former US ambassador to Austria best describes the computer’s functions‚ "It enables the mind to ask questions‚ find answers‚ stockpile knowledge‚ and devise
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Computer Memory Basics Although memory is technically any form of electronic storage‚ it is used most often to identify fast‚ temporary forms of storage. If your computer’s CPU had to constantly access the hard drive to retrieve every piece of data it needs‚ it would operate very slowly. When the information is kept in memory‚ the CPU can access it much more quickly. Most forms of memory are intended to store data temporarily. As you can see in the diagram above‚ the CPU accesses memory according
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INTRODUCTION The history of computer development is often referred to in reference to the different generations of computing devices. Each of the five generations of computers is characterized by a major technological development that fundamentally changed the way computers operate. The history of computer development is often referred to in reference to the different generations of computing devices. Each of the five generations of computers is characterized by a major technological
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Computer Keyboard (1874 – 1982) Although the first Computer Keyboard came out in 1964‚ it was a long evolution process from 1874-1982‚ to form the modern computer keyboard as we know it... One of the most common electronic input devices available nowadays is the “computer keyboard”. The “keyboard” enters instructions and data into the “memory” of the “computer”. “Keyboards” are used to “program”‚ operate and manage files and programs on a computer “interface”. This is accomplished by users
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often computers and related equipment are being involved in the educational process nowadays. This tendency of wiring schools‚ exercising long distance learning‚ and depending on the internet for information is apparently being actively promoted. Lately‚ politicians and some educators have begun praising computers as the new technological universal remedy‚ “the one that will turn classrooms into cybernetic gardens for growing young minds” (EMC Paradigm Publishing). The utilization of computers in education
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