When in AV (Audio Visual) we are often met by three-letter acronyms. And sometimes it’s just numbers. In this article it’s the numbers 8, 0 and 2. We are met by them together with other numbers and letters almost daily, some examples are 802.11, 802.3, 802.1. Then let’s add some letters to… 802.1q, 802.3bt, 802.11n or even more numbers. 802.15.4. But what do they all have in common? And what sets them apart?