The company that used to be Tymshare
Timeshared access to the 36-bit computers
Tymshare was in the Top 10 for Silicon Valley
Employers in 1982. In 2018 Nathan Gregory wrote a book
"
The Tym Before ...: The Untold Origins of Cloud Computing"
a more detailed history of Tymshare/Tymnet..
Tymcom-X history tidbit:
Tymshare's PDP-10s. It was a descendent of TOPS-10 but had many of
the important features of TOPS-20 such as real paging and
controllable/spawnable processes. TYMCOM-X, one of the best kept
secrets in the PDP-10 folklore, was written by Bill Weiher, Vance
Socci , Allen Ginzburg, Karen Kolling, Art
Atkinson, Gary Morgenthaler, Todd Corenson and Murray Bowles. Some
copies still run today. Most TYMNET development was done under
TYMCOM-X and Tymshare sold a TYMCOM-X system to TRW to use in their
credit reporting network, which was based on a purchased copy of
TYMNET circa 1979.
[E-mail from Vance Socci 1994-05-20]
What follows is my personal history with the company.
Tymshare was purchased by McDonnell Douglas in 1984. The airplane company
got rid of the Tymshare name, and renamed the Tymnet group to be
McDonnell Douglas Network Systems Company. Tymshare's hardware people
became McDonnell Douglas Field Service Company. The company also acquired
Microdata (McDonnel Douglas Computer Systems Company) before deciding that
diversifying into computers was a bad idea.
MDC sold the networking to British Telecom, who named it BT Tymnet
for a while, then BTNA (BT North America). Then BT sold the networking
group to MCI in return for forming a partnership of MCI + BT = Concert.
BT was planning a merger with MCI when WorldCom made a better offer.
September 1998: merged company renamed to "MCI WorldCom".
June 2000: Company renamed to "WorldCom, Inc".
June 2002: The TYMNET X.25 Packet Network is scheduled to be shutdown.
Possible tie-in with the SC30M (36-bit computers) running Compuserve Classic.
2006: Verizon acquires MCI 
Under Construction
Need to add more details here.
Old TYMNET.COM website
Up to the index for PDP-10 page.
Maintained by Joe Smith at js-cgi@inwap.com
