This module explains the management and support aspects of distributed systems with special attention to e-business and security. This is one module of an extensive handbook that systematically discusses how to translate e-business strategies to working solutions by using the latest distributed computing technologies. Chapters of this module discuss the following topics a) planning, organizing, staffing, and monitoring/control activities in e-business environments; b) the emerging role of "management platforms" such as Tivoli and Openview that can be used to manage networks, databases, applications, and computer systems; c) the importance of security in modern digital enterprises with risk anaysis and a methodology; d) security management approaches and the basic cryptography techniques such as public/private key encryption, PKI, digital certificates, digital signatures, and digital envelopes; e) how to use the security technologies and approaches to develop solutions that secure corporate networks, computing platforms, middleware services, databases, and applications; and e) state of the practice (case studies), market (commercial products), and art (research and development trends).of e-business applications. Chapters of the module also include several real life examples and case studies to highlight practical applications. Additional information and instructor material available from author website (www.amjadumar.com).