teleprinter-style keyboards became the main input device for computers. A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol. However‚ to produce some symbols requires pressing and holding several keys simultaneously or in sequence. While most keyboard keys produce letters‚ numbers or signs (characters)‚ other keys or simultaneous key presses can produce actions or computer commands. Despite the development of alternative
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Overview of the Computer System This lesson includes the following sections: • The Parts of a Computer System • Looking Inside the Machine • Software: Bringing the Machine to Life The Parts of a Computer System • What is a Computer? • Hardware • Software • Data • Users The Parts of a Computer System - What is a Computer? • A computer is an electronic
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and Security Measures A diverse group of people often referred to as “hackers” have been stereotyped as unethical‚ irresponsible‚ and a serious threat to society for their actions of breaching of computer systems in an undesirable manner. I will attempt to construct a picture of what a computer crime is‚ as well as a portrait of what a hacker is‚ their concerns‚ and how most hacking occurs. I will also cover the best security measures against undesirable hacking. It is my intent to argue that
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Dept of Computer Science‚ University of Jaffna. Table of Contents Computer Fundamentals Introduction to Computers A computer is a man-made‚ programmable electronic machine that can store‚ retrieve‚ and process data according to a given set of instructions. Whatever information given to a computer is termed input. The computer input typically comprises of two things: Data and Instructions. The data are the facts‚ which are to be processed‚ and the instructions describe how the computer should
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Computers In Daily Life There is a need for more computers in everyday life‚ in homes‚ schools and on the job. The advancement of computer technology today in all facets of the world‚ and life are growing to the point that everyone will need a computer to carry out their everyday life. Computer technology today is at the threshold of making life easier for everyone in the world. Computers are helping students get better grades in school‚ from help with homework over the internet to doing research
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Computer System Introduction & Definitions — Computer is an electronic device that is used to solve various problems according to a set of instructions given to it — A computer is a programmable machine that receives input‚ stores and manipulates data‚ and provides output in a useful format Brief History of Computer — The first use of the word "computer" was recorded in 1613‚ referring to a person who carried out calculations‚ or computations‚ and word continued to be used in
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Evolution of Computer A.P.Mohana priyaa Abacus Chinese invented calculating device called ABACUS Ø Also known as “SOROBAN” perform addition and Ø subtraction Wooden rack holding two horizontal wires with beads Ø strung on them. Rules memorized by the user Ø Regular arithmetic problems can be done Ø NAPIER’S DEVICE John Napier a Scottish Mathematician Ø Set of eleven animal bones later it was replaced by Ø rod Number marked on them‚they placed
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future is the thing that takes a lot of our time and efforts being computer oriented. We have to imagine‚ try to figure out what the future will bring us. We are supposed to lead our generation in looking for new and life enhancing technologies to make man ’s life easier and more enjoyable. How will it look like? [pic]THIS IS THE MOST IMPORTANT QUESTION THAT CAME TO OUR MINDS. • Will we be able to talk to our computers in the future? • Will they respond freely? • Can they understand
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Computers and the Many Benefits Computers play a huge part in many all of our lives in one way or another. They have many purposes and are used in various types of environments‚ such as medical facilities‚ government offices‚ and many households. They also are the reason we are able to surf the internet‚ watch animated television shows and see movies with special graphics. Computers have impacted our lives in many ways. You may not notice it but they did make life a lot easier. Without computers
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provided by the sensor and sending the barcode’s content to the scanner’s output port. Biometrics Biometrics[1] (or biometric authentication)[note 1] refers to the identification of humans by their characteristics or traits. Biometrics is used in computer science as a form of identification and access control.[2] It is also used to identify individuals in groups that are undersurveillance.[citation needed] Biometric identifiers are the distinctive‚ measurable characteristics used to label and describe
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