Office 365 is a suite of online productivity tools that includes Exchange Online for email, SharePoint Online for document storage and collaboration, OneDrive for file storage, and Skype for Business/Teams for communication. It provides 50GB mailboxes, 1TB of OneDrive storage, and allows access to Office apps online and for mobile devices. Additional tools include Yammer for enterprise social networking, Delve for discovering content, Forms for surveys, and Flow for automating workflows. Office 365 has plans for home users, small/medium businesses, and large enterprises.