| Engine |
Measures
Link Popularity |
Counts
"Click" Popularity |
| About.com
* |
No |
No |
| AltaVista |
Yes
|
?? |
| AOL |
Results
may be influenced through association with
Inktomi. |
See
Inktomi and Direct Hit. |
| Direct
Hit |
Yes |
Yes |
| Excite |
Yes |
No |
| FAST |
? |
No |
| Google |
Yes
- Major Factor |
In
Testing |
| Overture |
No
- But non-Overture listings are influenced
by Inktomi. |
Effects
nothing in rankings but certainly counts every
click. |
| Inktomi |
Yes |
Possibly
via association with Direct Hit |
| LookSmart
* |
No
- but does list Inktomi results as secondary
results. |
No,
but is associated with Inktomi which is associated
with Direct Hit. |
| Lycos
|
Unknown |
No |
| MSN |
Possibly
- does not run on search service. Uses others.
Is influenced by those results. |
Possibly
influenced via association with Direct Hit. |
| Northern
Light |
No |
No |
| Open
Directory * |
No |
No |
| Yahoo
* |
No |
Yes
- for the purpose of determining "Most Popular
Site" listings. |
Domain
Registration 
