Office 365 ProPlus, the cloud-connected version of Office, delivers the most productive and most secure Office experience—with the lowest total cost of ownership for deployment and management. However, for customers who aren’t ready for the cloud, Office 2016-2019 provides new features and updates to the on-premises apps for both users and IT professionals. Like Windows Long Term Servicing Channel (LTSC) releases, Office 2016-2019 provides a set of valuable enhancements for customers who can’t be cloud-connected or receive regular updates.

Microsoft Office 2021 includes
- Microsoft Office 2021 Professional Plus
- Microsoft Office 2021 Professional Plus + Visio Pro 2021 + Project Pro 2021
- Microsoft Standard 2021
- Microsoft Office 2021 Standard + Visio Standard 2021 + Project Standard 2021
- Microsoft Word + Excel + PowerPoint 2021

System requirements
- x86 or x64 processor with a clock speed of 1 GHz and support for the SSE2 instruction set.
- 2 GB of RAM is recommended for graphics, Outlook Instant Search, and some advanced features.
- 3.0 GB of free hard disk space.
- The screen resolution is 1280 x 800. To use hardware graphics acceleration, you need a graphics card that supports DirectX10.
- Operating system: Windows 10, 11