https://docs.qgis.org/3.10/en/docs/gentle_gis_introduction/
https://docs.qgis.org/3.10/en/docs/training_manual/
https://docs.qgis.org/3.10/en/docs/user_manual/
https://www.linkedin.com/learning/search?keywords=qgis
https://learn.arcgis.com/en/projects/get-started-with-arcgis-pro/
https://www.esri.com/training/catalog/search/
https://pro.arcgis.com/en/pro-app/help/main/welcome-to-the-arcgis-pro-app-help.htm
https://www.linkedin.com/learning/search?keywords=arcgis+pro
A nice interactive infographic developed by MakePath that provides easy access to documentation for a number of significant open source geospatial software projects can be found at the link below:
This guide, "Geographic Information Science" is a derivative of "GIS & Geospatial Data Services" from UT Libraries used under CC BY NC. This guide, "Geographic Information Sciences" is licensed under CC BY NC.