nostr:npub16jupxu70nh0pg0wt4maseaf2fg3kv2tgcjal2kaaunms2ltdaxysdry8u7 nostr:npub14unegdf5e6jvv5lllda6cdqw8xxg8dmjcl0z3glexdxtd59xeydqylnv92 PJL over Ethernet used to allow you to send custom messages to the display on HP printers, might still do, so you could send random weirdness to any printer you could contact via network.