Brupt is a clever little Google custom search service which delivers searches specifically for document files. You know, PDFs, .docs, .ppts and .xls. Great way to find special information that wouldn’t normally float to the top of a generic Google results page. Definitely worth a bookmark.
Brupt.com is based on Google Custom Search Engine, it uses Filetype parameters offered by Google to filter the information and show the pages according. Brupt exists because not everyone is aware of filetype which is one of the most useful operators offered by Google to restrict the results to documents and not WebPages.