“Microsoft 365” or simply “365” is the umbrella term for Microsoft’s software suite. This suite was formerly known as “Office”, such as “Office 2016” or “Office 2019”, and then “Office 365”. Microsoft then created “Microsoft 365” to include the Windows operating system (OS) itself.
Microsoft 365 includes, but is not limited to, the following programs and services: Windows, Word, Excel, PowerPoint, OneDrive, SharePoint, Outlook, Delve, Stream, etc.