In 2011, Microsoft began offering their Microsoft Office productivity suite, which included Word, Excel, PowerPoint, Outlook, and more, as a subscription-based service they called Office 365. Benefits of Office 365 included additional storage and collaboration features via the cloud, as well as access to the latest features, patches, and security updates. Over the last decade, they have grown this SaaS (Software-as-a-Service) product by adding apps and features.