it’s a really dense subject, it’s okay to just admit it’s difficult to read, you don’t have to accuse it of LLM usage lol

I knew some of these, fascinating to learn about the others

QR codes, I printed a bunch on shipping label paper and stuck them on the walls near light switches, the entrance, etc. You can also do them with NFC readers for phones but that’s more expensive and you need an NFC writer.