A Web office is a hosted application, with bundled tools that allow users to share and collaborate on a broad set of information and ideas such as documents, tasks, and calendars. At its most basic incarnation, a Web office is used for sharing information online and Web-based collaboration. Depending on the needs and size of the organization, other features may be important, such as integration with common word processing applications or more advanced communication tools and database applications.
See also "What is a Web Office?" on Intranet Journal.