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The following chart demonstrates how each major search engine
and directory relates to each other. Directories, unlike
search engines use humans to categorize sites. (As the
search engine industry changes, this information changes.)
| Search Engine |
Type Of Main Results |
Provider Of Main Results |
Paid Results |
Directory and/or Backup Results |
| AllTheWeb
(FAST) |
Crawler |
AllTheWeb
(FAST) |
Overture (& late
2002 Lycos) |
n/a |
| AltaVista |
Crawler |
AltaVista |
Overture |
LookSmart |
| AOL
Search |
Crawler |
Google |
Google |
Open
Directory |
| Ask
Jeeves |
Crawler |
Teoma |
Google |
Open
Directory |
| Google |
Crawler |
Google |
Google |
Open
Directory |
| HotBot |
Clickthrough |
Direct Hit |
Overture (& late
2002 Lycos) |
Open
Directory & backup from Inktomi |
| LookSmart |
Human |
LookSmart |
LookSmart |
Backup from Inktomi |
| Lycos |
Crawler AllTheWeb
(FAST) |
AllTheWeb
(FAST) |
Overture
(& late 2002 Lycos) |
Open
Directory |
| MSN
Search |
Human |
LookSmart |
Overture |
Backup from Inktomi |
| Netscape |
Search Crawler |
Google |
Google |
Open
Directory |
| Overture |
Paid |
Overture |
Overture |
Backup from Inktomi |
| Open
Directory |
Human |
Open
Directory |
n/a |
n/a |
| Teoma |
Crawler |
Teoma |
Google |
n/a |
| Yahoo |
Human |
Yahoo |
Overture |
Backup from Google |
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