web annotation
Comparison of notetaking software
Social bookmarking
Some reference management software packages also support web annotations
Backlinks
Online deliberation
Folksonomy
Metadata
Threaded discussion
Virtual graffiti
Comparison of software saving Web pages for offline use
/suto3/google.iconweb annotation
/suto3/Google画像検索.iconweb annotation
/suto3/Google定義検索.icon web annotation
/suto3/wikipedia.iconweb annotation
/suto3/weblio.icon web annotation
/suto3/kotobank.icon web annotation
/suto3/jisho.icon web annotation