Alexa=ia_archiver
Altavista=Scooter
AllTheWeb=FAST-WebCrawler
Excite=ArchitextSpider
Gigabot=Gigabot
Google=Googlebot
Google Mobile=Googlebot-Mobile
Google Images=Googlebot-Image
Google Adsense=Mediapartners-Google
Yahoo=Yahoo! Slurp
Inktomi=Slurp
MSN=MSNBOT