InternetRFC & W3Services... The SlideShare URLink, modern telecommunications history presentation, IMO has accurate information.

Understanding -HowTo- Origin will create our future.

https://www.slideshare.net/venky_1986/2002-0918-internet-history-and-growth

https://en.wikipedia.org/wiki/History_of_the_Internet
Note: Internet=Infrastructure & W3=WebServices

Remark: My first eMail address was pre-DNS and followed a format of name5678@IPv4, prior to that "UNIX Talk" was used on a terminal. Also, 20191029 marks 50 years for InterNet.