User-agent: * 
Disallow: /

User-agent: Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp) 
Disallow: /
#
#User-agent: Yahoo! Slurp
#Disallow: /
#
#User-agent: msnbot/1.1
#Disallow: /