Here begins QSL Card week, here at PotD.
Ham radio and CB radio people use them, or have used them, as calling cards. "QSL" is a code in "Q" code, but not the code of the "Q" of Q-Anon; "QSL" means, basically, "got yer message".
There are a lotta great QSL card designs, and they generally have that homemade flavor. Like a folk art. Stay tuned to this frequency for more of 'em!