In the ever-evolving world of TV, data-driven television is still relatively new, so there’s a lot to learn—from the basic vocab to the various elements that make up the modern TV ecosystem. With so many channels, acronyms, and similar-sounding phrases, even the experts can get confused.

Here, we’re providing the basics you need to clear things up. See how all the types of TV fit together. Learn the terms you’re most likely to hear. And take the first steps to taking on the medium.