Office is productivity software (including Word, PowerPoint, Excel, Outlook, and OneNote) that is installed on your desktop or laptop computer. Office 365 is an online subscription service that provides email, shared calendars, the ability to create and edit documents online, instant messaging, web conferencing, a public website for your business, and internal team sites—all accessible anywhere from nearly any device.
Customers with Office 2010 installed on their computer can quickly configure their software to work with Office 365. These users can easily retrieve, edit and save Office docs in the Office 365 cloud, co-author docs in real-time with others, quickly initiate PC-to-PC calls, instant messages and web conferences with others.
Office 365 is also compatible with Office 2007 and newer editions of Office and select Office 365 plans include Office Professional Plus.