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Subject Guides Prepared by the Swain Library
General Guide |
Analytical Chemistry |
Biotechnology |
Chemical Laboratory Safety |
Crystallography |
Drug Information |
Inorganic Chemistry |
Life Scientists |
Physical Chemistry |
Polymer Chemistry |
Searching the Internet |
Spectral Information Searching the Internet
Search Engines |
Directories |
Portals |
General Info. |
Links Search Engines
General |
Specialized |
All-In-One |
Meta |
Invisible Web General Search Engines
Google |
AllTheWeb |
AltaVista |
Compare Search Engines
Google (http://www.google.com/)
- Most popular web search engine
- Largest Size - 1.5 Billion
- Updated Monthly, daily for few million time-sensitive pages
- All pages crawled and indexed up to 110k
- Results sorted by relevance via PageRank analysis
- Google Toolbar available
- Other databases & directories at site:
- Images
- Groups
- Directory
- .edu Search
- .gov Search
- Mail Order catalogs
- Linux, BSD Unix, & Apple Macintosh
- Default: ALL terms must be present
- Phrases: Put terms inside "quotation marks"
- Stemming: No
- Stop Words: Put + in front of term
- Case Sensitive: No
- Boolean:
- - to exclude
- OR to search either term
- Proximity: No
- Nesting: No
- Advanced Search Form:
- Language, file format, date, where terms occur, filter for
adult content, find similar pages, and links to a page
- Google is the only search engine to crawl and make the content
of 12 main file types, including PDF, PostScript, and Microsoft
Office, searchable
- Translation of web documents available
- Search U.S. home or business telephone number -> address and
link to map
- Search address -> link to map
- Results include: cached versions of pages, dictionary definitions
for underlined terms, and links to similar pages
AllTheWeb (http://www.alltheweb.com/)
- Fast-Growing, 625 million now. Goal is 10 billion by end of 2003
- Entire site is updated about every 10 days
- Entire content on a web page is crawled and indexed
- Sorted by perceived relevance
- Other databases & directories at site:
- News
- Pictures
- Videos, MP3 & FTP Files
- Scirus (Elsevier)
- Soccer
- No Directory present
- All but Scirus & Soccer searched simultaneously
- Scroll down results page and click on tab
- Default: ALL terms must be present
- Phrases: Put terms inside "quotation marks"
- Stemming: No
- No Stop Words (all words searched)
- Case Sensitive: No
- Boolean:
- Proximity: No
- Nesting: Yes
- Advanced Search Form:
- Language, where terms occur, domain, date and filter for
adult content
AltaVista (http://www.altavista.com/)
- Oldest Search Engine
- 550 Million Web Pages
- Complete crawl not done in last 6 months but some pages
crawled recently
- All pages crawled and indexed up to 100k
- Special Features:
- Ticker symbols provide direct links to stock quote, news,
SEC filings
- Translation using Babel Fish
- Other databases & directories:
- News
- Directory
- Comparison Shopping
- Yellow Pages
- People Finder
- Maps
- .edu and .gov Searches
- Text-only Search
- Images
- Video & MP3/Audio Files
- Many differences between Basic and Advanced Interfaces
- Default: ALL terms must be present
- Phrases: Put terms inside "quotation marks"
- Stemming: Yes. An asterisk (*)
- Use in middle or at end of term
- Use to represent an entire word inside a phrase
- Stop Words
- Cannot be searched in Basic Interface
- All words are searchable in Advanced Interface
- Case Sensitive: YES
- Boolean:
- +/AND, OR, -/AND NOT in Basic Interface
- and, or, and not in Advanced Interface
- Proximity:
- NEAR in Basic Interface
- near in Advanced Interface
- Nesting: Yes
- Advanced Search form:
- Must use field codes to search by anchor, applet, domain,
host, image, like, link, text, title, url. Pull down menus to
limit by language and date
- Results sorted by:
- Relevance in Basic Interface
- NOT sorted in Advanced Interface unless terms put in
"Sorted By" box
- Viewing Results:
- Only 200 records can be displayed in Basic Interface
- Up to 1,000 records can be viewed in Advanced Interface
Last modified:
June 24, 2005
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