Fundamentals of Computer Systems You need to be able to: (a) define a computer system (b) describe the importance of computer systems in the modern world (c) explain the need for reliability in computer systems (d) explain the need for adherence to suitable professional standards in the development‚ use and maintenance of computer systems (e) explain the importance of ethical‚ environmental and legal considerations when creating computer systems. What is a computer system? At its very basic‚ a computer
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Question 1-CXC Past Paper Questions: 1989-2011 May 1989 (a) Find the exact value of (4⅘÷2⅔)- (1⅓) 2 (5 marks)(b) Write your answer to part (a) as a decimal correct to 2 significant figures. (2marks)(c) A sum of money is to be divided among A‚B‚ AND C in the ratio of 2:3:5. Thelargest share amounts to $1200.Calculate: (i) the total sum of money to be shared(ii) A’s share(iii) the percentage of the total amount that Breceives (5 marks) May 1990 Calculators‚ slide rules and mathematical tables
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What is a computer: A computer is an electronic device that executes the instructions in a program. A device that accepts data‚ processes the data in accordance with the stored program‚ generates results and usually consists of input‚ output‚ storage‚ Airthmatic logic and control units. A computer has four functions: a. accepts data Input: Data or information written into the computer by user The Information Processing Cycle b.processes data Processing: The calculations performed according
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Computer Architecture The circuitry in a computer which controls the manipulation of data is called the central processing unit‚ or CPU. In the machines of the mid-twentieth century‚ CPUs were large units comprised of perhaps several racks of electronic circuitry that reflected the significance of the unit. However‚ technology has shrunk these devices drastically. The CPUs found in today’s desktop computers and notebooks are packaged as small flat squares (approximately two inches by two inches)
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TYPES OF COMPUTERS The types of computers range from the Hybrid to the Analog types. The computers you come across in the daily course of your day range from laptops‚ palmtops and towers‚ to desktop computers‚ to name a few. But the very word “computers” reminds one of the desktop computers used in offices or homes. Different categories of computes have been devised in keeping with our varied needs. The Types Of Computers: Analog and Hybrid (classification based on operational principle)
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HISTORY AND APPLICATIONS OF COMPUTERS || INTRODUCTION When more than one thing is needed to work together before an action can take place‚ we say we have a system. The computer needs several things before it can be used to solve problems. Therefore‚ we say the computer is a system. We may have systems around us even in our body. How we eat or what happens to the food we eat is a system. This is called the Digestive System. We need mouth‚ tongue‚ teeth and stomach for us to make good
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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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INDIVIDUAL ASSIGNMENT Five Forces Framework in Personal Computer Industry (DELL) AZIZUL RIZAL ZULKAPLI ZP01654 ZCZB6023: BUSINESS ECONOMICS AND DECISION ANALYSIS Lecturer: PROF. MADYA DR. NIK MUTASIM Table of Contents Table of Contents 2 Introduction: Five Forces Framework in Personal Computer Industry 1 Threat of New Entrants 3 Bargaining Power of Suppliers 4 Bargaining Power of Buyers 5 Rivalry among Existing Firms 6 Threat of Substitutes and
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Features of the Teaching Guides A practical approach Issues involved in using computers Ideas on class management Some ideas for practical application Unit 1: The evolution of computers Teaching objectives Learning outcomes Introduction for the teacher Sample lesson plan for a 40-minute period Suggested answers to end-of-unit questions Additional information for the teacher Activity sheet Test sheet Answers to activity sheet Answers to test sheet v v vi vi vi vii vii viii 1 1 1 1 2 4 5 7 8 10 10
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History of Computer Introduction Man’s progress is measured by sophistication of his tools. First‚ he discovered how to control fire. Eventually‚ he invented the wheel. He built boats and earned to harness the wind. As soon as commerce developed in the early societies‚ people recognized the need to calculate and keep track of information. They soon devised simple computing devices and bookkeeping systems to enable them to add‚ subtract‚ and simple record transactions. Today‚ we are witnessing
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