Office 365 is a brand name which Microsoft uses for a group of their
software, services and subscriptions. Office 365 is the most used business
productivity suite in the world.
It combines Microsoft Office desktop suite with the cloud-based versions of Microsoft’s services. Office 365 also supports Microsoft’s vision of cloud computing, specifically that of running an organisations collection of apps. With Exchange Online, SharePoint Online, and Lync Online, users get all the benefits of accessing their email, calendar, company resources, and communication tools.
As Office 365 is an incredibly popular type of software, it is used throughout a number of organisations.