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Worldwide cloud computing services revenue is continuing to grow at a rapid rate, with it expected to top $56.3 billion (US) in 2009, according to a report from Gartner. The lion’s share of the market will be made up of cloud-based advertising for the next few years.

Market revenue grew by 21.3 per cent from 2008’s $46.4 billion, and it will continue to increase to $150.1 billion in 2013. Sixty per cent of cloud computing revenue right now is coming from cloud-based advertising like Google AdWords, and while that percentage will decrease over the next few years, it’s still expected to make up 51 per cent of total worldwide cloud computing revenue in 2013, said Ben Pring, research vice president at Gartner.

"We’re regarding it as a form of business process, and we decided to call it cloud-based advertising to differentiate it from some of the more traditional business processes that we look at in the report," Pring said.