Windows system environment variables

When writing batch processing, directories such as C:\ProgramData and C:\Users\Home\AppData\Local are often used. Sometimes the user names are different. In this case, we need to use variables.

Variable comparison table

Reference reading:

• https://www.askvg.com/list-of-environment-variables-in-windows-xp-vista-and-7/
• https://windowsloop.com/list-of-all-environment-variables-in-windows-10/
• https://ss64.com/nt/syntax-variables.html