Web 1.0 v. Web 2.0
1.0 is Static & HTML;
2.0 is Dynamic & PHP, ASP, Java, etc (server side programing)
1.0 is from writer to reader, like a book
2.0 is collaborative, there are comments, profiles, multiple writers and votes, mass participation, social
1.0 is pages, lists and tables
2.0 is pages and apps, there are queries submitted by users, search, exportation, etc.
1.0 is taxonomy
2.0 is more about user tags, categories added by users, search, relevance, keywords