In five short years, cloud computing has gone from being a quaint technology to a major catchphrase. Amazon and others are now moving at Internet speed, trying to offer better security, faster networking, more compliance and a host of other products that are attempting to meet the demands of startups, consumers and enterprises alike. On GigaOM’s Structure channel, we cover the gear and software that comprises the cloud, the services and the people who are changing the industry. Now for the first time, we’ve decided to condense that knowledge into the Structure 50, a list of the 50 companies that are influencing how the cloud and infrastructure evolves. All of these players, big or small, have people, technology or strategies that will help shape the way the cloud market is developing and where it will eventually end up. Companies mentioned in this report include Amazon, Rackspace, Cloudera, China Telecom and SeaMicro. For a full list of companies, and to see the Structure 50 as one full report, sign up for a free trial.