It's also a CLI, a daemon, a network abstraction, a company… It just doesn't make any sense to try to count how many things "docker" is. It makes sense to ask w

It's also a CLI, a daemon, a network abstraction, a company… It just doesn't make any sense to try to count how many things "docker" is. It makes sense to ask which "docker" do you mean when you talk about "docker". But since the author doesn't really talk about anything coherent here, it doesn't make sense to ask.