Most semiconductor makers have been savaged by falling prices, but Rohm, the world's largest maker of specialist microchips, has maintained margins by adding extra functions to its devices.

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They also show that one phone looks a lot like an other and that adding extra functions to a device isn't always the path to a good user experience.

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Access control beefs up the barricades by granting entry only to specific site functions, such as adding an item to a shopping cart.

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For now, the company will not be working with Google on search functions, Zuckerberg said, adding that Google is not able to process Facebook updates as quickly as Facebook users might like.

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The services will allow users to perform basic messaging functions such as signing in to and out of the system, sending and receiving messages from buddies, adding new buddies to their list, and finding out who is available online.

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