Search Tools and Techniques
| subject directories |
are human-selected Internet resources that are arranged by
topics. |
| search engines
|
are computer programs (robots) that scan the
contents of the web for web sites. |
| meta search engines
|
are search tools that simultaneously search other
search engines to find information. |
| evaluative search sites
|
are short cuts to finding better web sites. Only web sites
that have been evaluated by a librarian or experts in their field are listed.
|
| invisible web |
includes information in databases, bots and web rings that
usually can not be accessed by using a search engine or subject directory.
|
- There are differences between subject directories and search engines.
| Subject Directory |
Search Engines |
| organized by subject |
collected by spiders(automated computer programs
|
| compiled by humans |
not collected by humans |
| may be evaluated |
no evaluation of web sites |
| to find websites under a broad category and
progressively narrower search terms
|
to find websites using specific terms using key
words or phrases |
| when you only have a general idea |
when you have a focused topic |
| good for beginners - can browse good for gathering resources
on a general topic |
good for finding exact web site with specific information
|
| limited number of web sites indexed |
more web sites connected to your topic |
| to find more relevant web sites |
not all web sites will be relevant |
Techniques to find information:
Top
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