A communication system architecture for the office

The Communication System Architecture (CSA) distributed system is described. CSA establishes a distributed architecture, supported by a hierarchy of object machines, enabling transparent communication between a set of interconnected heterogeneous computing and communication systems, and provides an object model for building high-quality distributed applications. After a brief introduction, the authors present an overview of the CSA architecture, describe the CSA object machines and communication facilities, discuss the CSA object model, and present the CSA mail service as an example of an application