A desktop publishing application from Microsoft that focuses on page layout and graphic design.
This is Microsoft's latest "guidance" from a few days ago, which does not mention if you can have two versions of Publisher on the same computer:
https://support.microsoft.com/en-gb/office/microsoft-publisher-will-no-longer-be-supported-after-october-2026-ee6302a2-4bc7-4841-babf-8e9be3acbfd7 Can I still install Publisher after October 2026? If you have a Microsoft 365 subscription, Microsoft Publisher will no longer be available for installation or download after October 2026. However, if you have the Perpetual version of Publisher, although support will end, you will still be able to install and use the app beyond this date.
What happens to my existing Publisher files after the end of support? If you have a Microsoft 365 subscription, you will no longer be able to open or edit your Publisher files using Microsoft Publisher. It is recommended to convert your existing files to PDF or Word format before this date. If you have the Perpetual version of Publisher, you will still be able to access and edit your files.