Apple developer's graphic to symbolise data being transmitted from the cloud
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Apple reaches for the sky with new iCloud service

Apple has unveiled its much-anticipated iCloud service at its annual developers' conference. Apple boss Steve Jobs returned from medical leave to show off the features of the web-based service.

iCloud aims to synchronise and co-ordinate the key content people store and share across their devices. Jobs said that Apple's music store, iTunes, now had an iCloud element so music bought on one device could be propagated across all the Apple gadgets that person owns.

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