Delicious

Joshua Schachter launched Delicious (Del.icio.us) , a social bookmarking service  for discovering, sharing and storing web bookmarks. One of its important innovations was the option to tag user bookmarks with any number of keywords. The user could also see other users’ bookmarks which contained the same tag. In December 2005, Delicious became part of Yahoo!.

2003/09

https://www.livescience.com/20727-internet-history.html