Over the last decades open hypermedia systems become one of the well known systems for knowledge discovery and management. The First Edition of Omer Mohamed, Service Oriented Architecture for Open Hypermedia Systems, contains: *Historical review of open hypermedia systems, Scenarios Description and Analysis *The Proposed Analysis Framework for evaluation of Open Hypermedia Systems. *A comprehensive Summary and Analysis of Comparison *The Proposed architecture for service oriented Open Hypermedia Systems. *Prototypic Implementation of the architecture. This book provides an understanding of open hypermedia systems (history and trends) , some examples of famous systems,and the issues related to each system as well as an applicable architecture that can be used to develop open hypermedia systems using componet-based architecture. This book hihlights the fundamentals and work done in Hypemedia systems. and should be especially useful for professionals in hypermedia systems, or those working with knowledge discovery and management systems.