Computer is a processing machine which processes raw data to produce meaningful data. It has tremendous change with comparison to calculator. Characteristics of Computers: - Computers have got their importance due to the following characteristics: - 1. Accuracy: - Computer performs every operation with equal and high accuracy. Errors can occur in a computer due to only human mistakes‚ weaknesses and imprecise thinking. 2. Repeatitiveness: - Once the set of instructions are permanently
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101: COMPUTER LITERACY QUIZ CHAPTER-2 Name_______________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) ________ is data that has been organized or presented in a meaningful fashion. 1) _______ A) A number B) Information C) A symbol D) A character 2) Which of the following is NOT one of the four major data-processing functions of a computer?
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Generations of Computer Computer Age: Past‚ Present‚ and Future The First generation The Second Generation The Third Generation The Fourth Generation The Fifth Generation The Computer Age 1951-1958 The First Generation Vacuum Tube – – Rapid changes Four generations over 50 years Trends across generations – Decrease size – Increase speed Magnetic core memory Storage – – Heat Burnout Machine language Punched cards Tape (1957) Characteristics of 1st Generation Computers Computers
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Computer Security‚ Ethics and Privacy Ethics and Society * Computer Ethics * Are the moral guidelines that govern the use of computers and information systems. Information Accuracy * Information accuracy today is concern because many users access information maintained by other people or companies‚ such as on the internet. * Do not assume that because the information is on the web that is correct * Users should evaluate the value of the web page before relying on its content
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SYLLABUS Cambridge International AS and A Level Computing 9691 For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations
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REAL TIME POWER SYSTEM SECURITY ASSESSMENT USING ARTIFICIAL NEURAL NETWORKS REAL TIME POWER SYSTEM SECURITY ASSESSMENT USING ARTIFICIAL NEURAL NETWORKS Abstract Contingency analysis of a power system is a major activity in power system planning and operation. In general an outage of one transmission line or transformer may lead to over loads in other branches and/or sudden system voltage rise or drop. The traditional approach of security analysis known as exhaustive security analysis involving
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“Mobile Computing and Social Networks” Richard Henderson Dr. James Francisco CIS 500 – Information Systems for Decision Making 9/7/2012 Strayer University Mobile Computing and Social Networks Mobile computing and social networks are part of the daily lives of millions of Americans. “48% of American adults own a mobile computing device in some form according to the latest Nielsen data.” (Knott‚ 2012) As far as social networking site usage “over 65% of all internet users in the United
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A COMPUTER VIRUS A case study presented to Dr.Pedro D. Abanador In partial fulfilment of the requirements in the subject RES323- Research Methodologies Leading to the degree Bachelor of Science in Information Technology Presented by: Estimada‚ Ronald B. BSIT-3A2 February 4‚ 2014 CHAPTER I THE PROBLEM AND ITS BACKGROUND Introduction A computer virus is a small software program that spreads from one computer to another
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keyboard-8 bit Computer systems v Manual systems Benefits of computer system: Takes up less space Searching is very quick More than one person can access the same data form their network PC. The data stays in the computers memory Fewer staff are needed to look after a computer system Reports can be generated very quickly-automated Problems of a computer system: Setting up is very expensive Computer systems need people to maintain them POWER CUTS! It is easy to hack into a computer system.
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Five Generations of Computing The history of computer development is often referred to in terms of five distinct eras‚ or "generations" of computing devices. Each generation of computer is characterized by a major technological development that fundamentally changed the way computers operate‚ resulting in increasingly smaller‚ cheaper‚ more powerful and more efficient and reliable devices. The First Generation: 1946 to 1955 The first computers used vacuum tubes for circuitry‚ magnetic drums
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