- Internet : International "network of networks" that connects computers together through the Internet Protocol Suite and supports applications like Email and the World Wide Web.
- Microblogging : The practice of making short pieces of information (a few words or phrases, often with links and sorted in chronological order) public on a regular basis.
- FriendFeed : A feed reader, social aggregator and microblogging platform.
- Google Buzz : Add brief definition or description
- Identi.ca : Add brief definition or description
- Jaiku : Microblogging/lifestream aggregation service created by Jyri Engeström, purchased by Google, released as open source for Google App Engine and now broadly replaced by Google Buzz.