Microsoft Office is a suite of desktop productivity applications and client and server software designed for data analysis, presentations and numeric manipulations.
Microsoft Office 365 provides web, desktop, and mobile apps for Outlook, Word, Excel, PowerPoint, OneNote, Publisher, Skype, OneDrive, Exchange Online, and more.
Microsoft Teams is a chat-based workspace in Office 365 which lets users collaborate on documents, make voice & video conference calls, view chat logs, and more.