1980 Milestone Bulletin Board System (BBS) emerges as one of the earliest known forms of social media, and remains popular and under development until the late 1990s.[8] (21h 41min, dec 31, 1979 y – 2h 1min, mar 11, 1980 y)
Added to timeline:
Date:
21h 41min, dec 31, 1979 y
2h 1min, mar 11, 1980 y
~ 2 months and 12 days