4 SHARING INFORMATION

Social networks are virtual enviroments for comunnication, interaction and the sharing resources.

4.1 Horizontal social networks

Facebook allows a groups of 'friends' to publish both public and private messages with text, links, fotos, vídeos...
Twitter has some unusual features. Users publish short text messages (tweets) with no more than 140 characters.
Google+ allows users to create 'circles' of friends in order to share information.

4.2 Vertical social networks

Sharing professional information: LinkedIn
Sharing general information: FriendFeed
Sharing photos: Instagram, flickr
Sharing videos: YouTube, Vimeo, Dailymotion
Live streaming: Skype, livestream