While Facebook is an information system, another one is Microsoft Office Live.
Microsoft Office Live is a set of Internet-based services designed for consumers and small businesses interested in creating a website or storing and sharing documents online.It is a free service for storing and sharing documents online. It is most commonly used for work, school, and home projects, allowing users to manage their documents from remote locations, alleviating the need for flash drives. Workspaces can be accessed directly from Office Word, Excel and PowerPoint by installing an Office Live Update.
Create your free online workspace today at: http://office.live.com/