...UNIT 1 A Introduction to computers Unit 1 WUC 117/03 Introduction to Computing and Internet Introduction to Computers B WAWASAN OPEN UNIVERSITY WUC 117/03 Introduction to Computing and Internet COURSE TEAM Course Team Coordinator: Mr. Kevin Tan Pooi Soo Content Writer: Ms. Parasathy Daivasigamani Instructional Designer: Ms. Jeanne Chow Academic Members: Mr. Chandarasageran a/l Natarajan and Mr. Ishan Sudeera Abeywardena COURSE COORDINATOR Mr. Kevin Tan Pooi Soo EXTERNAL COURSE ASSESSOR Associate Professor Norhaziah Md Salleh PRODUCTION Editor: Mr. Terence Too Yang-Yau In-house Editor: Ms. Jeanne Chow Graphic Designers: Ms. Patsy Yap and Ms. Leong Yin Ling Wawasan Open University is Malaysia’s first private not-for-profit tertiary institution dedicated to adult learners. It is funded by the Wawasan Education Foundation, a tax-exempt entity established by the Malaysian People’s Movement Party (Gerakan) and supported by the Yeap Chor Ee Charitable and Endowment Trusts, other charities, corporations and members of the public. The course material development of the university is funded by Yeap Chor Ee Charitable and Endowment Trusts. © 2008 Wawasan Open University First revision S1 2011 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission from WOU. Wawasan Open...
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...In the world of technology and computers, there has always been a way to make programs applications more advanced more simplistic and better than ever before with updates. When everything also is made into the way of life of computers, there’s always one thing to provide out the details and the simplistic trails of operating systems. Without the limitations of these operating systems, many would wonder as a society what could have happened if the operating system was never invented. Without operating systems and computers, things could and would have proceeded into the complications of today and things might not have changed if it wasn’t for the internet and different frustrations of doing many things by hand, but in the ways of introducing technology now is very simplistic. Using computers now in the present have been used as a daily important part of our lives to stay communicated to the world and to the rest of the others in real time. Running on computers have been of choice running operating systems to stay on top of programs and applications to get and take care of the other particles of tasks needed to be done or just for leisure and entertainment. Using operating systems known in short terms for “OS” is all on the society’s choice running what they think is the best for what they can get for the computer. There is all but one OS out of the major ones that is running for free without price, and that would be Linux. In today’s society, there’s a lot that Linux can do...
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...Introduction to Computers and the Internet 2 1) Basic browser buttons: The same picture is blown up twice below, so that the labels are easier to read. 2) Favorites: A favorite (or a bookmark, depending on your browser) is a link to a page that you store in your web browser. This makes it easier to pull up that page because you do not have to remember its full address, search for it, or click through links on a page to get to it. If there is a page you want to remember or like to go to a lot, you may want to add it to your favorites. Here you can see the pages that are currently saved on your computer or add a new one. 3) Home Page(s): The home page is the page or pages that the browser pulls up when you first open it. You can set it to open more than one, and you can choose what it opens first. To do this, you will want to use the “home” icon. [pic] Clicking on the icon will make the browser pull up the home page, but by clicking on the arrow immediately to the left of it, you can set a new home page. Here you can see the current home page highlighted and the options to change or remove home pages. If you choose to add or change, you will see this: You can either make the page you are currently on the home page, or tell the browser to bring it up in addition to the page(s) it is already opening. If you find that you have too many home pages, you may want to remove some, like this: 4)...
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...GRAPHICS Road safety Everyday many people are involved in road accidents. Some are killed. Many more are injured or maimed. So it is important for us to learn to use the roads properly and safely. No sane person would like to be involved in an accident. As the roads are very busy nowadays, we should be very careful when crossing one. It is safer to use a pedestrian crossing or an overhead bridge whenever one is available. Never cross a road by dashing across it. That is inviting trouble. If there are no crossings, then we must look carefully right and left and cross only when it is safe to do so. Some of us take the bus to school. It is important that we do not try to get on or off a bus while it is still moving. I tried to get on a moving bus once. It dragged me a short distance and nearly ran over me. I was lucky to escape with only some scratches on my legs. Also we must not fool around while in the bus. A suddenly lurch can send us knocking our heads against something hard. Using a bicycle can be dangerous too. We must pay attention on the road and never cycle too far out to the middle of the road. We must obey all traffic rules. Also we must make sure our bicycles are in good condition with working brakes, lights etc. These are some things we can do to avoid accidents. However there is no guarantee that we will never be involved in one. The important thing is to stay alert at all times while using the roads. We must know what is happening around us. In that way we can...
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...1) A computer is unique compared to any other machine because of its ability to ________. process large amounts of information simultaneously process complex math functions change its programming use many different types of software Score: 1 2) Bits are used to measure ________. storage capacity data transfer and Internet connection rates the size of files the amount of time a user is connected to the Internet Score: 1 3) The smallest, most lightweight, and inexpensive computer is the ________. notebook laptop netbook client Score: 0 4) Distributed computing distributes ________. the processing of tasks across a group of computers power ability across all users Internet usage across the entire network disk storage for all computer users Score: 1 5) Smartphones use ________ technology, allowing users to perform several functions with one device. embedded design invisible computing convergence grid computing Score: 1 6) The intersection of a row and a column in a spreadsheet is called a ________. field text cell record Score: 1 7) Shaynia has been working with her colleagues on a Word...
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...MANUALE MATLAB http://www.ciaburro.it info@ciaburro.it Indice 1 Introduzione 1.1 Matlab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Per iniziare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Fondamenti di Matlab 2.1 Capacit` di Matlab . . . . . . . . . . . . . a 2.2 Operazioni . . . . . . . . . . . . . . . . . 2.3 Espressioni . . . . . . . . . . . . . . . . . 2.4 Lavorare con le matrici . . . . . . . . . . . 2.5 Operazioni sui file . . . . . . . . . . . . . 2.6 Grafici . . . . . . . . . . . . . . . . . . . . 2.7 Operazioni sui grafici . . . . . . . . . . . . 2.8 Dati immaginari e complessi . . . . . . . . 2.9 Assi . . . . . . . . . . . . . . . . . . . . . 2.10 Alfabeto greco e caratteri speciali . . . . . 2.11 Immagini . . . . . . . . . . . . . . . . . . 2.12 Grafici di matrici . . . . . . . . . . . . . . 2.13 Help e Documentazione Online . . . . . . 2.14 L’Ambiente di MATLAB . . . . . . . . . 2.15 Ulteriori informazioni su Matrici ed Array 2.16 Strutture di controllo del flusso . . . . . . 2.17 Scripts e Funzioni . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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...Choosing and Using Credit Cards Chances are you've recieved your share of "pre-approved" credit card offers in the mail, some with low introductory rates and other perks. Many of these solicitations urge you to accept "before the offer expires." Before you accept, shop around to get the best deal. Credit Card Terms A credit card is a form of borrowing that often involves charges. Credit terms and conditions affect your overall cost. So its wise to compare terms and fees before you agree to open a credit or charge card account. The following are some important terms to consider that generally must be disclosed in credit card applications or in solicitations that require know application. You also may want to ask about these terms when you're shopping for a card. Annual Percentage Rate. The APR is a measure of the cost of credit, expressed as a yearly rate. It also must be disclosed before you become obligated on the account and on your account statements. The card issuer also must disclose the "periodic rate" - the rate applied to your outstanding balance to figure the finance charge for each billing period. Some credit card plans allow the issuer to change your APR when interest rates or other economic indicators - called indexes - change. Because the rate change is linked to the index's performance, these plans are called "variable rate" programs. Rate changes raise or lower the finance charge on your account. If you're considering a variable rate card, the issuer must also...
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...Windows 7 Presentation APTECH COMPUTER EDUCATION What is an OS ? • Operating systems provide a software platform on top of which other programs, called application programs, can run. History of Microsoft Windows • 1980-MS-DOS • 1982–1985: Introducing Windows 1.0 • 1987–1992: Windows 2.0–2.11—More windows, more speed • 1990–1994: Windows 3.0–Windows NT—Getting the graphics • Windows NT • 1995–2001: Windows 95—the PC comes of age (and don't forget the Internet) • 1998–2000: Windows 98, Windows 2000, Windows Me Continue… • Windows 2000 Professional • 2001–2005: Windows XP—Stable, usable, and fast • 2006–2008: Windows Vista—Smart on security • 2009–Today: Windows 7(The version of Kernel is 7.0 or above 6.0) • Expecting Windows 8 Hardware Requirements Flavors of Windows 7 • • • • • • Windows 7 Starter Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Enterprise Windows 7 Ultimate Editions of Windows 7 Windows 7 Ultimate Windows 7 Home Premium Windows 7 Enterprise Windows 7 • Standard Professional consumer edition Consumers Windows 7 Home • Does not include Premium Windows 7 Home Basic Windows 7 Starter business features Windows 7 Targeted for value PCs enthusiasts for want all all for accessing for edition in targeted markets, in environments, • Business-focused edition,emergingwhomanagedWindows 7 small factor PCs full Windows The Professional editioncustomer. and lowermeant markets7 standardtechnicalfor forWindows...
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...Advantages and disadvantages of internal rate of return are important to understand before applying this technique to the projects. Most projects are well analyzed and interpreted by this well-known technique of evaluation and selection of investment projects. This technique has certain limitations in analyzing certain special kinds of projects like mutually exclusive projects, an unconventional set of cash flows, different project lives etc. ADVANTAGES OF INTERNAL RATE OF RETURN: The various advantages of internal rate of return method of evaluating investment projects are as follows: Time Value of Money: The first and the most important thing is that it considers the time value of money in evaluating a project which is a big lacking in accounting rate of return. Simplicity: The most attractive thing about this method is that it is very simple to interpret after the IRR is calculated. It is very easy to visualize for managers and that is why this is preferred till the time they come across certain occasional situations such as mutually exclusive projects etc. Hurdle Rate / Required Rate of Return has Not Required: The hurdle rate is a difficult and subjective thing to decide. In IRR, the hurdle rate or the required rate of return is not required for finding out IRR. It is not dependent on the hurdle rate and hence the risk of a wrong determination of hurdle rate is mitigated. Required Rate of Return is a Rough Estimate: A required rate of return is a rough estimate being made...
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...Introduction It is undeniable that the computer has become an essential gadget for daily lives of every human being. The Internet is an absolute necessity for both adults and children. It is impossible to believe to do anything without the Internet, especially from the youth’s perspective. Youths today spend too much time on the computer, surfing the Internet for hours. Some have become much too addicted and don’t realize that they actually suffer from Internet Addiction Disorder (IAD). Let’s have a look at how computers directly have effects upon youths nowadays. One of the main consequences of spending too much time on the computer that youths are likely to disregard is personal neglect. When one is too obsessed with surfing the Internet, they tend to pay no attention to their standard of living apart from the computer which they are using. Some may not take bath, clean their room, or eat well as they are much too focused on what they are doing virtually. Because of the long hours spent engaged with a computer, youths often have eating irregularities, such as skipping meals or overeating. This indirectly leads to health disorders, for instance, malnutrition of the youth’s body. Isolation, avoidance and no family bonding at all is another outcome which happens in a youth’s life when they get excessively addicted with the Internet. Because of spending too much time on the computer, youths have a propensity to reduce socializing with others. They tend to feel that computer...
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...Introduction to Computer Security CSE 3482 Introduction to Information/Computer Security Instructor: N. Vlajic, Winter 2014 Learning Objectives Upon completion of this material, you should be able to: • Describe the key security requirements of confidentiality, integrity and availability (CIA). • Describe the CNSS security model (McCumber Cube). • Identify today’s most common threats and attacks against information. • Distinguish between different main categories of malware. Required Reading Computer Security, Stallings: Chapter 1 Computer Security, Stallings: Chapter 6 Introduction • Information Technology – technology involving development & use of computer systems & networks for the purpose of processing & distribution of data in many organizations, information/data is seen as the most valuable asset categories of IT jobs: IT administrator - installs, maintains, repairs IT equipment IT architect - draws up plans for IT systems and how they will be implemented IT engineer - develops new or upgrades existing IT equipment (software or hardware) IT manager - oversees other IT employees, has authority to buy technology and plan budgets Introduction (cont.) • Information System – entire set of data, software, hardware, networks, people, procedures and policies that deal with processing & distribution of information in an organization each component has its own strengths, weaknesses, and its own security requirements information...
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...CSS150-1302B-04 Introduction to Computer Security Phase 3: Discussion Board 3 Networks, Cryptography, and Malicious Activity Professor: Shawn Murray June 5, 2013 In this paper I will discuss a malicious computer worm that spread rather quickly and affected thousands of people and targeted a company in Utah. I will discuss how the worm spread in detail. Lastly, I will discuss how to prevent / defend against such worms. On January 26, 2004 MyDoom, also known as W32.MyDoom@mm, Novarg, Mimail.R and Shimgapi was a computer worm that affected Microsoft Windows (wildammo.com, 2010). MyDoom in 2004 had set the record for spreading the fastest through email. It was said to be started by e-mail spammers through junk mail being sent. That was one way the worm was sent. MyDoom was also sent out as failure sent messages. One of the messages that MyDoom had sent out was “Andy; I’m just doing my job, nothing personal, sorry.” (wildammo.com, 2010). With messages such as that and sent failure / system error messages, one whom was not knowledgeable of such worms would foolishly open it. These messages including but not limited to the one mentioned above brought suspicion to a lot of people and it was believed that the maker of the worm was paid. To date, the author of MyDoom is not known. It is thought though that MyDoom was created in Russia by a programmer (wildammo.com, 2010). In the result of MyDoom globally internet access had slowed down...
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...Essential Introduction to Computers 1. Define the term computer and discuss the four basic computer operations: input, processing, output, and storage 2. Define data and information 3. Explain the principle components of the computer and their use 4. Describe the use and handling of floppy disks and hard disks 5. Discuss computer software and explain the difference between system software and application software 6. Identify several types of personal computer application software 7. Discuss computer communications channels and equipment and the Internet and World Wide Web 8. Explain how to purchase, install, and maintain a personal computer, a notebook computer, and a handheld computer 9. Define e-commerce 1. Computer: Input, Processing, Output, and Storage In today's world, computers are used for almost every task imaginable. Routine activities such as paying bills, buying groceries, or communicating with a friend can be done with a computer. That is why it is important not only to know how to use a computer, but also to understand the components of a computer and what they do. Recent studies report that almost 40% of homes surveyed have personal computers, and this number is growing. Given the widespread use of computers, computer literacy - a knowledge and understanding of computers and computer uses - has become an essential ingredient in the recipe for success in today's world. Florida was the first state to demand computer literacy...
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...Since my freshman year of high school, I have used a computer for at least an hour (a conservative minimum) virtually every single day. At one point I would return from soccer practice at 6pm, shower, eat dinner, and then play about three hours of computer games before beginning my homework. My friends and I would plan computer game matches during 4 th period calculus rather than pay attention. My vision has declined since then from 20/20 to 20/25. I can easily spend hours on the computer, but I often tell myself that I do not have time to go running. The first thing I do when I return to my apartment is check my email. When I experience “writer's block” while using Microsoft Word, I have an overpowering urge to sign onto AOL Instant Messenger. Once “online,” I find it extremely difficult to sign off. Help me, Dr. Phil. The inspiration of this project is based on the following assumptions: A significant amount of college students share my experience of computer abuse. They find themselves staying on their computers longer than expected and sacrificing their daily objectives as a consequence. Because time is a scarce resource, computer use must be replacing other activities. Also, as the technology sector grows, jobs are becoming less physically demanding. Many employees sit down for hours, whether they are secretaries, programmers, researchers, administrative officials, etc, concentrating on small characters on their computer monitors. Not only is this substituting more active...
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...The person might have a computer virus infection when the computer starts acting differently. For instance getting slow or when they turn the computer on, it says that all the data is erased or when they start writing a document, it looks different, some chapters might be missing or something else ubnormal has happened. The next thing usually the person whose computer might be infected with virus, panics. The person might think that all the work that have been done is missing. That could be true, but in most cases viruses have not done any harm jet, but when one start doing something and are not sure what you do, that might be harmful. When some people try to get rid of viruses they delete files or they might even format the whole hard disk like my cousin did. That is not the best way to act when the person think that he has a virus infection. What people do when they get sick? They go to see a doctor if they do not know what is wrong with them. It is the same way with viruses, if the person does not know what to do they call someone who knows more about viruses and they get professional help. If the person read email at their PC or if they use diskettes to transfer files between the computer at work and the computer at home, or if they just transfer files between the two computers they have a good possibility to get a virus. They might get viruses also when they download files from any internet site. There was a time when people were able to be sure that some sites...
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