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Joe Casad is an engineer who has written widely on PC networking and system administration. He has written twelve books on computers and networking, including MCSE Windows NT Server and Workstation Study Guide, MCSE Networking Essentials Training Guide, Windows NT Server 4.0 Professional Reference and Windows 98 Professional Reference. He is the former managing editor of the Network Administrator magazine and currently the Senior Editor of UNIX Review and Technical Editor of SysAdmin magazine. Joe also has a gift of being able to present difficult topics in an understandable manner.