Compo2 prelim


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Compo2 prelim

  1. 1. Introduction to Information SystemCOMPO2
  2. 2. Information System Is any combination of information Technology and people’s activities using that technology to support operations, management. In other words, IS is frequently used to refer to the interaction between people, algorithmic processes, data and technology
  3. 3. Components of IS1. Management Information System It is a system that provides information needed to manage organizations efficiently and effectively.(resources such as technology, information and people)2. Decision Support System Is a computer based information system that supports business or organizational decisional activities.
  4. 4.  DSS serves as the management, operations, and planning levels of an organization and help to make decisions which may be rapidly changing and not easily specified in advance. DSS includes knowledge based systems.(ex. Inventories, Comparative sales, projected revenues)3. Executive Information System Is a type of MIS intended to facilitate and support information and decision-making needs of senior executives. Considered as specialized form of DSS.
  5. 5. 4. Transaction Processing System It collects, stores, modifies and retrieves transactions of an organization.
  6. 6. WEB or the WWW It is a system of interlinked hypertext documents accessed via the internet. With a web browser, one can view web pages that may contain text, images, videos and other multimedia and navigate between them via hyperlinks**hypertext is a text displayed on a computer with references to other text that reader can immediately access usually by a mouse click
  7. 7. **hyperlink is a reference to a document that reader can directly follow or followed automatically. It points out the whole document or to specific element within a document.(hypertext is a text with hyperlink)
  8. 8. Surfing the Web Surfing is the term used to denote the navigating around different websites.1. In order to surf the Web, you need a web browser, a software application for retrieving, presenting and traversing information resources on the WWW.
  9. 9. Popular web Browser Internet explorer – 36.3% Firefox – 24.1% Chrome – 18.2% Safari – 10.7% Opera – 4.4% Android – 1.7%As of aug. 2011
  10. 10.  Once you have a web browser, you must ensure that your internet connection are established well. Then, you may now launch your web browser Type the complete URL address of a site into the address bar of your web browser. Then navigate it through hyperlinks and address bar.
  11. 11. Client VS server Client is an application or system that accesses a service made available by the server whereas Server is a computer program running to serve request of other programs – the client They are connected via a network Together they calledClient-server architecture
  12. 12. Website A collection of interrelated web pages containing images, videos or other assets. It is hosted on at least one web server, accessible via network such as internet through URL.
  13. 13. Components of website HTML- For the content CSS- For the design Javascript- For the interaction PHP- For the dynamic web pages
  14. 14. Web page Is a document or information resource that is suitable for the WWW and can be accessed through a web browser. It is composed of an HTML tags
  15. 15. URL Uniform Resource Locator Universal Resource Locator It is a character string that specifies where a known resource is available on the internet and the mechanism for retrieving it.
  16. 16. Searching the web It means the user will try to access their needed information through web Web gives millions of results in just few seconds User use different search engines for web searching
  17. 17. Popular Search Engine Google 150 M Yahoo 137 M Bing 80 M ASK 60 M Teotama 9M Duck Duck Go 198K Entire Web 123K Blekko 120K Scrub the web 58K Gigablast 29K
  18. 18. Some ethical issues in web Protection of intellectual property Prevention of fraud Protection of freedom of expression versus problems of defamation Protection of privacy control of spamming
  19. 19. What is HTML? HTML stands for Hyper Text Markup Language It is a language for describing web pages It is not programming language, it is mark up language Mark up language is a set of mark up tags It uses mark up tags to describe web pages It is invented by Tim Berners- Lee in 1989
  20. 20. Application needed increating HTML Internet Browser HTML editor A graphic program
  21. 21. HTML tags These are the keywords surrounded by angle brackets like <html> Usually tags come in pair like <b> and </b> The first tag in a pair is the start tag, the second tag is the end Start and end tags are also called opening tags and closing tags
  22. 22. HTML example<html><head><title> hello </title></head> Hello<body>Hello</body></html>
  23. 23. Parts of HTML tag <html> - tells the web browser on the type of the document <head> - technical information about the document is stated <title> - gives the document a name <body> - where the actual documents are places
  24. 24. Basic formatting tags <b> bold</b> - to make the text bold <strong> </strong> - also for bold <u> </u> - for underline <i> </i> - for italic <em> </em> - also for emphasis <strike> </strike> - for strike through <center> </center> - to align text in center <tt> </tt> - for teletype text
  25. 25.  <h1> </h1> to <h6> </h6>-for heading <br>for breaking lines <pre> </pre>preformatted textPreserves spacing <sub></sub> subscript <sup></sup>superscript
  26. 26. HTML elements Html elements starts with a start tag / opening tag Html elements starts with a end tag and closing tag The element content is everything between the start and end tag Some html elements have empty content
  27. 27. HTML comments It makes html codes to make it more readable and understandable It is ignored by the browser and are not displayed <!---this is a comments ----->
  28. 28. Paragraph tags HTML documents are divided into paragraphs This is defined with <p> and </p> it has one attribute which is alignExample : <p align = “right/center/left”> sample paragraph</p>