There are different digital repository systems like Dspace, Greenstone which offers bibliographical search. These systems require submission of the files through an interface and goes to their proprietary database.
With latest virtualization technology you can put virtual machines of different operating systems in single computer.ie you can put an apple OS, windows and Linux in single system. Unlike in dual boot system you need not shut down the system and reboot to get into a different operating system.
Intranet or website search engine can be as relevant and reliable as Google's - and just as easy to use. Microsoft Search provides universal search for business, letting all enterprise or website content be searched through one easy, familiar search box. In fact, the Google Search Appliance can search intranets, web servers, portals, file shares, databases, content management systems, and real-time data in business applications, all with accuracy and ease.