For example, Zynga has created a computation that follows average daily users and average daily bookings (or revenue) per daily user.

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However, the textbook example was selected for ease of computation.

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In addition, the web-based service is able to do complicated computation on behalf of a robot - for example if it needs to work out how to navigate a room, fold an item of clothing or understand human speech.

BBC: Web-based 'brain' for robots goes live