Reason for edit
P.O.S. SW erased half my post. It took my list of friends I would send these out to. Well if you follow me or I follow you will get a card in the mail. If we would do something like this
Say you made a friend and you want to remember them.
Back in the day CBers (CB radio users) would send these out to their friends or to confirmed a radio contact.
These were all post card size and you just mailed them out.