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INFORMATION TYPE & FLOWS

on June 05, 2021 Computer Technology Systems

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on May 07, 2010

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Computer Repair with Diagnostic Flowcharts – e-book Tutorial

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THE COMPUTER SYSTEM AND HOW IT PROCESS DATA A computer system is a group of machines, or hardware that accepts data, process it, and display information. The main reason for using computer system is to process data quickly and efficiently so that the information obtained is timely, meaningful, and accurate. A computer system performs its information processing operations under the control of sets of instructions called programs. Computers read incoming data called input, process the data, and display outgoing information called output. Data itself consists of raw facts, data that is processed or operated to produces structured, meaningful information. Information processing is a set of procedures used to operate on data and produce meaningful results. Computer system consists of the following components; input devices, main memory and the central processing unit, output devices, and secondary storage devices. INPUT DEVICES READ INCOMING DATA There are many different types of input devi

E-Commerce

Introduction to E-Commerce Defining E-Commerce E-commerce covers any form of business transaction or information exchange that is executed using any form of information and communications technology. This embraces business-to-business; business-to-consumer; and government-to-nation; as well as exchange of tools like the Internet and the World Wide Web, intranets, extranets, electronic mail and Electronic Data Interchange. (UK’s e-centre) Brief history of E-Commerce; look at what drives E-Commerce; look at the components of an E-Commerce system; list the range of E-Commerce techniques; identifying them within different business contexts; start to look at the impact of E-Commerce on the organisation. The application of advanced information technology to increase the effectiveness of the business relationships between trading partners. (Automotive Industry Action Group in North America) The enablement of a business vision supported by advanced information tec

INPUT AND OUTPUT DEVICES

Keyboard The most common input device is the keyboard, which is basically the same the mechanical typewriter keyboard in that it has keys for printing upper and lower case letters, numbers and a variety of symbols. However, since it is used to print out more than just letters and numbers, it needs to have extra keys to perform these additional actions. The central section of the keyboard is the same as that of a mechanical typewriter; the numbers on the top row of keys and the letters and space bar below, all correspond exactly. Some of the punctuation marks above and around these keys are also the same although. as there is no standard layout for computer keyboards, each model has different combinations of symbols on each key. Mouse A mouse is a pointing device and is a excellent complement to the keyboard as an input device. The current trend in DOS and OS/2 operating systems towards ‘graphical user interfaces’ (GUI) has increased the popularity of the

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