Editing BS2000 (section)

===1970s===
In 1973, BS2000 V1.0 was a port of the TSOS operating system to models of the [[Siemens]] system 7.700<ref name="BS2000 vita">[https://sp.ts.fujitsu.com/dmsp/Publications/public/ps_bs2000-osd-v8-0.pdf BS2000/OSD V8.0 - New Technologies for Data Centers]</ref>
In June 1975, Siemens shipped the enhanced BS2000 V2.0 version of the TSOS operating system for the models of the Siemens 7.700 mainframe series for the first time under the name BS2000. This first version supported [[paging|disk paging]] and three different operating modes in the same system: interactive dialog, batch, and transaction mode, a precursor of [[online transaction processing]].
In 1977, the TRANSDATA communication system used [[computer networking]].

In 1978, [[Multiprocessing|multiprocessor]] technology was introduced. The operating system had the ability to cope with a processor failure. At the same time the new technology considerably extended the performance range of the system.
In 1979, a [[transaction processing monitor]], the ''Universal Transaction Monitor'' (UTM), was introduced, providing support for online transaction processing as an additional operating mode.