On Mon, 2026-08-24 at 22:09 -0500, Steve Lewis via cctalk wrote: > Hmm, I hadn't ever heard of anything referred to as "Tymnet." The > product I came across was (I believe) a follow on or derivative of > BTS (SDS > 940), starting c. 1967 Tymeshare (with a y). I had assumed it was > US-based, but possibly am mistaken.
I did a little bit of digging and found this: Tymshare was an independent computer time-sharing company founded in 1964 by Tom O'Rourke and Dave Schmidt, former engineers from General Electric. Tymnet was developed later as a proprietary packet-switched data communications network built and operated by Tymshare itself. [1 [1], 2 [2], 3 [3]] I had thought they were maybe CDC-based, but there were based on SDS (formerly GE?) 940 and DEC PDP-10. — Van > > -Steve > > > > > On Mon, Aug 24, 2026 at 1:38 PM Ken Seefried <[email protected]> > wrote: > > > > > > > On Sun, Aug 23, 2026 at 4:47 AM Steve Lewis via cctalk < > > [email protected]> wrote: > > > > > > > > I never found too much info about "tymshare" (apparently a late > > > 1960s kind > > > of "corporate or business-to-business digital exchange" system, > > > maybe for > > > inventory or check-processing?). > > > > > > > > > > > Sorry, I should probably look through the preso before replying, > > but are > > you perhaps thinking of "Tymnet", a product of Tymeshare, Inc. > > (with an > > 'e')? > > > > KJ > > [1] 1 https://www.computerhistory.org/revolution/mainframe-computers/7/181 [2] 2 https://www.computerhistory.org/brochures/t-z/tymshare-inc/ [3] 3 https://en.wikipedia.org/wiki/Tymnet
