With Office 365 subscription plans you get the fully-installed Office applications: Word, Excel, PowerPoint, OneNote, Outlook, Publisher, and Access. You can install Office 365 across multiple devices, including PCs, Macs, tablets and mobile devices. When you have an active Office 365 subscription, you always have the most up-to-date version of the Office applications. Learn more about Office 365. Office as a one-time purchase includes applications such as Word, Excel, and PowerPoint for use on a single PC or Mac. The applications are not automatically updated; to get the latest version, you must purchase Office again when the new version becomes available.