A “Command Line Interface” is a shell of some kind kind.

Many devs still use classic IT:AD:CLI – but MS is making a push for them to get with the program and use IT:AD:Powershell for everything from here on in (been added prominently on the Start bar of new WIndows installs for a while now, whereas the CommandPrompt is not, every CommandPrompt command works on the IT:AD:Powershell commandline, etc).