What was the media progression that led to social media?

[mr.right dr.question]

I also want links for your answer so I can get a better understanding...

[KenK]

I doubt you'll necessarily find "links" because I am uncertain this is clearly a statement of simple fact. When computers were coupled with telephone modems, computers could access dial-up "bulletin boards" where people could have discussions and send and receive email. Pictures were not included, nor were videos or sound files, but this was certainly a start of social media... around 1985.