How does cat work?

"Cat" can refer to a few different things. Could you please clarify what you mean? For example:

* The animal: Are you asking how a cat's body works?

* The command: Are you asking about the "cat" command in a computer operating system?

* The online platform: Are you asking about the Cat platform?

* Something else?

Once you tell me which "cat" you're interested in, I can give you a better answer!