Transcript World Wide Web

World Wide Web
Library 150
Week 8
The Web
The World Wide Web is one part of the
Internet.
No one controls the web
Diverse kinds of services accessed via
the same interface.
Basic Web Vocabulary
WWW -
World Wide Web
Distributed multimedia hypertext system
HTML -
HyperText Markup Language
Language for documents on the WWW
HTTP -
HyperText Transfer Protocol
Set of rules for communication between
client & server
URL -Uniform Resource Locator
Address of an object on the Internet
Web Browsers
What is a web browser?
A web browser is the software that lets you
look at information on the world wide web.
Examples:
Microsoft Explorer
Netscape Navigator
Mozilla
Opera
Uniform Resource Locator (URL)
The URL identifies the computer,
directory and file where an item is
located and the type of protocol needed
to read that item.
.com commercial entity (well, usually...)
.edu educational institution (US only)
.gov federal government (US only)
.org non-profit organization
.net network provider
.mil military
Benefits of Using the Web!
Remote access to far away resources
24 hour Access
Multimedia Capabilities
Alternative Perspectives
Current Information
Challenges of Using the Web
Content Issues
Navigation Issues
Time-Consuming Experience
Difficult to Find Information
Size of the WWW
No standard vocabulary
No comprehensive search engine
Tools to Help
Search Engines
Search engines are computer programs that retrieve and report
specified data from their database(s). They use combinations of
keywords to retrieve the information.
Meta-Search Engines
Seach engines that search search engines
Directories
Directories are categorized listings of topics most frequently searched
on the Internet such as News, Weather, Entertainment, Sports, etc.
Subject Guides
Subject guides are lists of resources also organized by catagories but
usually more focused and created by someone with knowledge in the
area.
Calstate LA Web Search Page
Tips for Searching the WWW
Pick you search site.
Learn to use the site.
Choose your words carefully.
Vary your spelling
Know how to widen your search (OR)
Know how to narrow your search (AND & Not)
Use many search tools
In-Class Exercise
How to Critical Evaluate Websites