Professor Dr. Marti Hearst lectures at University of California at Berkeley. This is the first lecture of the course “Search Engines: Technology, Society, and Business” from School of Information Management and Systems (SIMS 141).

This video is about two hours. If you want to bypass the portion of the video that goes over the course logistic and skip directly to the part of the lecture on how the web works, skip to 30 minutes into the video. If you want to skip to how search engines work, skip to 76 minutes into the video.
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Here is an example of Microsoft’s surface computer. It is a coffee-table-like computer that allows multiple people to interact with the computer using multi-touch.

The surface computer can even recognize devices placed on it. These machines cost between $5,000 to $10,000.