Cloud computing, with its related software, platform, and infrastructure service models, has changed the way people use technology. It's so common that many people don't think about, say, webmail or online document sharing as a cloud computing service; it's just a normal part of the landscape. Both individuals and organizations use many cloud computing services. While Salesforce CRM is a widely used software as a service (SaaS) product, Salesforce also offers its Force.com platform in the PaaS (platform as a service) space. Is Force.com a real PaaS?