User-agent: psbot
Disallow: 

User-agent: NetMechanic
Disallow: 

User-agent: ia_archiver
Disallow: 

User-agent: sitecheck.internetseer.com
Disallow: 

User-agent: LinkWalker
Disallow: 

User-agent: FreeFind
Disallow: 

User-agent: MondoSearch
Disallow: 

User-agent: Spiderline
Disallow: 

User-agent: fusionbot
Disallow: 

User-agent: WebReaper
Disallow: 

User-agent: NPBot
Disallow: 

User-agent: *
Disallow: