Boolean for Info

Navigating the Net and Finding what you Want

URL: Internet Address

Every URL has four required parts (more are optional)

http://www.nasa.gov

1 2 3 4

click on the numbers to view the definition when finished, click the arrow to advance

Navigating the Net

•Search Engines•Metacrawlers use

more than one search engine at the same time

Click on the underlined word to view examples when finished, click on the arrow to advance

1 http

Each web page address begins with http:// which stands for Hyper Text Transfer Protocol. The http:// shows it is an Internet address.

2 www

Most, but not all, addresses contain www, which stands for World Wide Web

3 nasaThe next part of this address is nasa,

the name of the computer of “server” to which you connect. Every server on the Internet has an assigned label called the “domain name.” nasa shows that this computer belongs to NASA.

4 gov• Finally, another required part of

the domain name, called a “domain designator,” tells what kind of group owns the server.

org = organizationgov = government agencyk12.___.us = public schoolsmil = military agency

com = business

edu = university

net = network

aus = Australia

Search Engines

• All the Web www.alltheweb.com• Alta Vista www.altavista.com• Ask Jeeves www.askjeeves.com• Teoma www.teoma.com• Lycos www.lycos.com• Yahoo www.yahoo.com

Metacrawlers

• Dog Pile – www.dogpile.com• Mamma – www.mamma.com/• Metacrawler –

www.metacrawler.com• Search.com – www.search.com

Boolean logic operators

Each search engine site has its own “syntax” for joining keywords using Boolean logic operators (and, or, not).

Click here for more on Boolean

1. To find information on the planet Saturn; not the car company, type Saturn –cars

2.To find information about the history of paper, type“history of paper”

3. To find a lab lesson on Newton’s Laws for junior high, type “Newton’s Laws of Motion” + lab + junior high

Evaluating Internet Info

•Web-evaluations

•Reverse search