Types of Content Management in SharePoint
- Document Management
- Metadata Management
- Records Management
- Web Content Management
- Digital Asset Management
Difference between webpart and user control in SharePoint
I feel the most important difference is that the webparts supports personalization which means that changes in the personal view will be stored per user basis. Also as Rob said, the user has the freedom to add/remove as per his need. On the other hand a usercontrol is more of a kind of static one. So you need to provide a functionality that is not required to be added and removed every now and then.