Documents are uploaded by the users. Docstoc does not crawl the web for documents. Users add their content to the system, and Docstoc hosts the documents. When content is uploaded, users 1) categorize, 2) tag, and 3) describe their document so that it can easily be found by other users.
In addition users can use bulk upload features where they have the option to 1) drag and drop multiple files or folders into Docstoc or 2) â€œemail uploadâ€? by emailing their documents into Docstoc.