Artificial Intelligence: I loved this description of an augmented reality game played online with the released of AI in 2001. I had no idea this happened:
On the bottom right “S” in “Summer 2001,” you may notice five little hash marks. The “U” has none, but the other letters and numbers each have at least one — 3 on each of the “M”s, two on the “E,” etc. In total, including the blank “U,” we get ten numerals — which, in the U.S., is the number of numerals in a phone number. In this case, it’s (503) 321-5122. Call that number today and you’ll be asked to set up your voicemail box. But if you called that number in 2001, you received a clue […]
It goes on the involve websites, email, etc. There’s a detailed guide to the game available via Wayback here.