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A system of linked documents or files that we can access through the internet and display in a browser.

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System for exchangign messages between computers

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Communities of users and services:social networks, wikis, blogs, Google Mapas and You Tube. Exchange of information between users to makr up is calle Social Web

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Forums, chats, videoconferencing. Platforms for debete and exchange experiences.

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Buying and selling, watching TV, publishing your work,virtual visits to places...

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File transfer protocols,to transfer files.