Virtual Machine

Also sometimes called a "server", a Virtual Machine is simply a computer that doesn't have the controls that humans use computers with - no screen, no mouse, no keyboard. If you wanted to interact with a VM today, you would open the "Terminal" app on your laptop, enter a command, and talk to it through there.

VMs are also where all web software is hosted. Every time you visit a url, your browser establishes a connection with a VM and asks it for the files it needs to power what you see.