Office 365 is the brand name Microsoft uses for a group of software and services subscriptions, which together provide productivity software and related services to subscribers. For consumers, the service allows the use of Microsoft Office apps on Windows and macOS.
Excel is a spreadsheet developed by Microsoft for Windows, macOS, Android and iOS. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications.
PowerPoint is a slide show presentation program currently developed by Microsoft Microsoft for Windows, macOS, Android and iOS. PowerPoint is useful for helping develop the slide-based presentation format and is currently one of the most commonly used slide-based presentation programs available.
OneDrive is a file hosting service that allows users to sync files and later access them from a web browser or mobile device. Users can share files publicly or with their contacts; publicly shared files do not require a Microsoft account to access them.
OneNote is a for free-form information gathering and multi-user collaboration. It gathers users' notes (handwritten or typed), drawings, screen clippings and audio commentaries and can be shared with other OneNote.
Outlook is a personal information manager by Microsoft for Windows, macOS, Android and iOS. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note taking, journal, and web browsing.