Windows

On Windows, the terms "console", "terminal", "cmd window", and "command prompt" all mean the same thing. Here is what one looks like (one will look slightly different on your computer):

To open a console, press windows key + r. I.e., press and hold and then hit the r key. A Run window should appear. In it, type cmd.exe and press enter.

Alternatively, you can use the start menu as show in the following video.

macOS

On macOS, the terms "console" and "terminal" mean the same thing. Here is what one looks like (one will look slightly different on your computer):

To open a terminal, go to Finder, click on Utilities, and click on Terminal. The following video demonstrates this:

Linux

Here is what a terminal looks like on Linux (one will look slightly different on your computer):

To open a terminal on Ubuntu-like systems, press Ctrl+Alt+t. I.e., press and hold the Ctrl key, then press and hold the Alt key and while holding both of them, hit the t key.

On some other distributions of Linux, such as Zorin, the key combination may be different. For example, on Zorin it is Ctrl+Alt+4.