User-agent: Google
Disallow:

User-agent: Bing
Disallow:

User-agent: Yahoo
Disallow:

User-agent: Baidu
Disallow:

User-agent: AOL
Disallow:

User-agent: Ask.com
Disallow:

User-agent: DuckDuckGo
Disallow:

User-agent: Yandex
Disallow:

User-agent: Lycos
Disallow:

User-agent: Chacha.com
Disallow: