Microsoft Office is a bundle of Microsoft's productivity application. This includes Word, Excel, PowerPoint, Access and later Mail, Office Manager, and Outlook. The "1.x" versions of Microsoft Office were simply a marketing bundle of the standalone products sold together with no other packaging changes. Even though these were distinct applications, rather than one single monolithic program, they shared a similar user interface, integrated well together and shared the ability to embed documents from one application in the documents of another.