Editing Packet switching (section)

====GEIS====
As General Electric Information Services (GEIS), [[General Electric]] was a major international provider of information services. The company originally designed a telephone network to serve as its internal (albeit continent-wide) voice telephone network.

In 1965, at the instigation of Warner Sinback, a data network based on this voice-phone network was designed to connect GE's four computer sales and service centers (Schenectady, New York, Chicago, and Phoenix) to facilitate a computer time-sharing service.

After going international some years later, GEIS created a network data center near [[Cleveland]], Ohio. Very little has been published about the internal details of their network. The design was hierarchical with redundant communication links.<ref>{{cite journal |last= Schwartz |first= Mischa |author2= Boorstyn, Rober R. |author3= Pickholtz, Raymond L. |title= Terminal-Oriented Computer-Communication Networks |journal= Proceedings of the IEEE |volume= 60 |issue= 11 |pages= 1408–23 |date= November 1972 |url= http://rogerdmoore.ca/PS/TONET/TON.html#GEISCO |doi= 10.1109/proc.1972.8912 |access-date= 2013-08-30 |archive-date= 2013-10-20 |archive-url= https://web.archive.org/web/20131020092847/http://rogerdmoore.ca/PS/TONET/TON.html#GEISCO |url-status= dead |url-access= subscription }}</ref><ref>{{cite conference |first= Peter T. |last= Kirstein |title= A SURVEY OF PRESENT AND PLANNED GENERAL PURPOSE EUROPEAN DATA AND COMPUTER NETWORKS |book-title= Proceedings of the NATO Advanced Study Institute on Computer Communication Networks |publisher= Noordhoff International Publishing |location= Sussex, United Kingdom |year= 1973 |url= http://rogerdmoore.ca/PS/Kirs1973/Ki.html#GEISCO |conference=  |access-date= 2013-08-30 |archive-date= 2013-10-20 |archive-url= https://web.archive.org/web/20131020092837/http://rogerdmoore.ca/PS/Kirs1973/Ki.html#GEISCO |url-status= dead }}</ref>