REUTERS/Damien EagersAmazon's cloud revenue rose at the fastest clip in nearly three years, helping the company forecast quarterly sales above estimates and driving its shares up 14% in after-market trading. CLOUD REVENUE JUMPSIts cloud unit, Amazon Web Services, reported a 20% rise in revenue in the third quarter ending in September, compared with estimates of a 17.95% increase. The strong results from AWS, the world's largest cloud provider, followed stellar cloud revenue growth reported on Wednesday by Microsoft's Azure and Google Cloud, the No. Companies, including Amazon, are introducing AI into nearly every facet of their operations in hopes of reducing costs and boosting productivity. The unit reported revenue growth of 17.5% in the second quarter.