Tymnet

> “In about 1979, Tymnet Inc. was spun off from Tymshare Inc. to continue administration and operation of the Tymnet network and its VAN services.”

That would be around the time when they got Doug Engelbart’s lab:

“The lab was transferred from SRI to Tymshare in the late 1970s, which was acquired by McDonnell Douglas in 1984, and NLS was renamed Augment (now the Doug Engelbart Institute). At both Tymshare and McDonnell Douglas, Engelbart was limited by a lack of interest in his ideas and funding to pursue them, and retired in 1986.” https://en.wikipedia.org/wiki/Douglas_Engelbart

Memories connecting to qsd via Tymnet...

https://www.exploit-db.com/ezines/kr5hou2zh4qtebqk.onion/LOL...

Tymnet was involved in tracking down the attacker in The Cuckoo's Egg book.

See also DATAPAC https://en.wikipedia.org/wiki/DATAPAC