User-agent: http://help.yahoo.com/help/us/ysearch/slurp/
User-agent: http://sp.ask.com/docs/about/tech_crawling.html
User-agent: http://www.google.com/bot.html
User-agent: InternetSeer
User-agent: Voila
User-agent: http://search.msn.com/msnbot.htm
User-agent: http://www.alexa.com
User-agent: spider
User-agent: Yandex bot
User-agent: robot

Disallow:

User-agent: *
Disallow: /