Office 365 is a subscription-based version of Office 2013. There are two versions of Office 365:
Both versions of Office 365 come with several features not included in the traditional Office suite. For example, you'll receive 20GB of additional online storage space through OneDrive, and you'll have the ability to create and edit documents with the Office Mobile apps and the option to install Office 2011 on Mac OS X computers.
You can visit our lesson on Buying Office 2013 to learn more about purchasing a subscription to Office 365.
OneDrive was previously called SkyDrive. There's nothing fundamentally different about the way OneDrive works; it's just a new name for an existing service. Over the next few months, you may still see SkyDrive in some Microsoft products.
Because Office 365 requires an annual or monthly subscription fee, you'll need to be able to manage your account settings, including payment information.