Information & Security Volume 5, 2000 C4 in Defense Reengineering Edited by Velizar Shalamanov Editorial Reengineering Defense: The Role of C4 Velizar Shalamanov Lessons of Transition in Bulgarian Security and Defense Abstract Policy for Developing C4I Systems Loren Diedrichsen Command & Control: Operational Requirements and System Implementation Abstract Stoyan Balabanov and Karmen Alexandrova C4I System Reengineering: Essential Component of Bulgarian Armed Forces Reform Abstract Charles R. Myer C4ISR Architectural Frameworks in Coalition Environments Abstract C4 in National and International Coordination Vladimir Grigorov Engagement of the Ministry of Defense and Bulgarian Armed Forces in Establishing Information Society Abstract