friggin' snail mail

do you really think social media(s) appear(s) only with computers?

Snail mail is social contact, not social media. Just like calling your mom on the telephone is not social media.

No. My father friend used to be part of chess-over-mail society. He was participating in several competitions at the same time, and periodically was getting all country as well as regional bulletin on competition states, progress, tidbits etc. I was very fascinated by this whole setup...

And I heard as well that stamp collectors and coin collectors societies worked in the same way, bulletins, regional, all-country, exchanges etc.

All industries whose markets measure in the billions of dollars appear only with computers.

well, that might be true, if we measure social media in money