Your question must be absolutely specific to the SharePoint 2007 platform (including Windows SharePoint Services 3.0) to have this tag. If uncertain, please include the version in your question text rather than use this tag. Use functionality or feature set in your tags instead of version unless absolutely necessary.
There are still a number of questions using this tag that shouldn't be because it is a manual task to clean these up.
Microsoft Office SharePoint Server 2007 is a multi-purpose web application platform developed by Microsoft and released in late 2006. It includes functionality for collaboration, web publishing, document management, social networking, search, and business intelligence. Third-party solutions can be developed to further extend the platform.