What is Internet

1
What is Internet

• Internet is a network of networks, linking
  computers to computers. Each runs software to
  provide or serve information and/or to access
  and view information. The Internet is the
  transport vehicle for the information store in
  files or documents found through or using the
  internet on another computer.

2
World Wide Web (I)

• WWW incorporates gopher, FTP, telnet, and e-mail.
  When you log onto the Internet using Netscape,
  Microsoft Explorer Mosaic, Macweb, and
  Netcruiser, Lynx (often used from slow modems
  because it does not display images, colors, or
  sound, text only) browser, you are viewing
  documents on the World Wide Web.

3
World Wide Web (II)

• The WWW functions using Hypertext, highlighted
  links to other documents on the Web.

4
Browsers

• Browsers are software programs that enable you to
  view WWW documents.
• The translate HTML-encoded files into the text,
  images, sounds, and other features you see.

5
Location

• URL -- Uniform Resource Locator. The unique
  address of any Web document.
• Http -- Hypertext Transfer Protocol is an
  application-level protocol with the lightness and
  speed necessary for distributed, collaborative,
  hypermedia information systems.

6
Domain

• In the US, common domains are edu education,
  gov government agency, net network related,
  com commerical, org non-profit and resarch
  organizations.
• Outside US, domains indicate country ca
  Canada, uk United Kingdom, au Australia, jp
  Japan, fr France, etc.

7
Go / History

• Button in Netscape/Explorer Menu Bar at Top.
  Provides list of recent sites you visited,
  retained for the current session only. Click on
  any site in the list to return to the site.

8
Search Engines

• AltaVista -- Provides news, stock quotes and
  general interest zones.
• Upper case searches for an exact match.
• Lower case will match both upper and lower case

9
Search Engines

• HotBot -- Conduct your highly-specific Web
  search audio or video files, or general web
  sites.
• Use quotes around words that must appear as a
  phrase
• Automatically searches for words with same
  root spelling.

10
Search Engines

• Excite -- http//www.excite.com/
• Use quotes around words that must appear as a
  phrase
• capitalize words are considered to be proper
  nouns, are searched as phrases.
• uses machine intelligence to find
  cross-referenced terms.

11
Search Engines

• Infoseek -- general directory with search
  engine, daily news, weather and sports search
  by word association.
• Use quotes or hyphenate phrase, capitalize names
  and titles, use commas to separate lists of
  names.
• Automatically searches for words with same
  root spelling.

12
Search Engines

• Northern Light -- Allows users to refine a
  search and to shift through journal, book and
  industry data. http//www.northernlight.com
• Lycos -- http//www.lycos.com/index.html
  

13
Search Engines

• Yahoo -- http//www.yahoo.com
• use quotes for phrase searching
• use after 3 or more letters to get words with
  up to 5 additional lower case letters
• t restricts to titles/u restricts to urls

14
Boolean Search Logic

• Combine Terms AND, OR, AND NOT, NEAR --
  requires all terms appear in a record.
• OR retrieves records with either term.
• AND NOT excludes terms
• Parentheses may be used to sequence operations
  and group words

15
Truncation in a Search

• Enter the first part of a keyword, insert a
  symbol , and accept any variant spellings or
  word endings, from the occurrence of the symbol
  forward.
• Example femini retrieves feminine, feminism,
  feminism, etc..