User-agent: *
Disallow: /

User-agent: *msnbot*
User-agent: msnbot
User-agent: msnbot/1.0 (+http://search.msn.com/msnbot.htm)
Disallow: /

User-agent: *yahoo*
User-agent: Slurp
User-agent: yahoo
User-agent: Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp
Disallow: /