information system

1. Introduction to Information System
COMPO2

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. Components of IS
1. 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.  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. 4. Transaction Processing System
 It collects, stores, modifies and retrieves
transactions of an organization.

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. **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. 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. 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.  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. 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 called
Client-server architecture

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. Components of website
 HTML
- For the content
 CSS
- For the design
 Javascript
- For the interaction
 PHP
- For the dynamic web pages

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. 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. 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. 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. 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. 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. Application needed in
creating HTML
 Internet Browser
 HTML editor
 A graphic program

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. HTML example
<html>
<head>
<title> hello </title></head>
Hello
<body>
Hello
</body>
</html>

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. 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.  <h1> </h1> to <h6> </h6>-
for heading
 <br>
for breaking lines
 <pre> </pre>
preformatted text
Preserves spacing
 
 subscript
 
superscript

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. 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. Paragraph tags
 HTML documents are divided into
paragraphs
 This is defined with <p> and </p>
 it has one attribute which is align
Example : <p align = “right/center/left”> sample
paragraph</p>