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Table 3 Differences between Web 1.0 and Web 2.0.

From: Accuracy improvements for cold-start recommendation problem using indirect relations in social networks

Web 1.0 Web 2.0
DoubleClick Google AdSense
Ofoto Flickr
Akamai BitTorrent
mp3.com Napster
Britannica online Wikipedia
Personal websites Blogging
Evite Upcoming.org and EVDB
Domain name speculation Search engine optimization
Page views Cost per click
Screen scraping Web services
Publishing Participation
Content management systems Wikis
Directories (taxonomy) Tagging (“folksonomy”)