A primary difference between Delicious and Flickr is that while the tags on Delicious are primarily from the users of web documents that were written by another party, Flickr is primarily used by individuals to manage their own digital images, and the majority of the tags are users tagging photos they created themselves. This is not absolute; the system does have the option of allowing users designated as friends or family to tag a users’ photos. Additionally, users can and do enter images others created into the system, often from web sites. This use of the system is much more like Delicious, but seems to be a small fraction of the use.