.bat .ps1 .sh

.bat  run by cmd run on windows =>batch language  

.ps1 run by powershell CLI on windows =>powershell script

.sh  run by bash shell run in linux =>Bourne-Again Shell script (bash script)

Shell is a general term including both .bat, .bash script, as well as other types of scripts such as csh, tcsh, zsh, and others.

reference: https://www.youtube.com/watch?v=mUw58ogYufY