In the 90s, new languages and architectures were developed, new systems and networks were produced and new applications invented. The basic topics discussed are; High Speed Data Communications Protocols, Services and Networks for high speed data and for combined voice and data applications - i.e. ATM, SMDS, Frame Relay - Network Management, OSS Platforms, OSI and other information Technology Services, Network Control and Routing, Emergency Control and Telecommunication Politics. This publication offers the material basis for propagating the most advanced ideas, products, decisions and results of the 90s, and thereby it celebrates the advancements of Computer Communication on the route towards a new era.