User-Agent: DISCo Pump, Wget, WebZIP, Teleport Pro, WebSnake, Offline Explorer, Web-By-Mail
Disallow: /

User-agent: Googlebot-Image
Disallow: /

User-agent: Googlebot 
Disallow: /*.pdf$

User-agent: *
Disallow: /*.pdf$

User-agent: *
Disallow: /*.doc$