This series presents the features of UNIX that are most useful to new users, as well as system administration tasks and process management. Basic features discussed include logging in and out, file administration, command processing, displaying text, and using mail. UNIX shells - Bourne, Korn, and C - are presented, including a comparison of their advantages and disadvantages, and writing basic shell programs that include repetitions, conditional statements, and functions. Many system administration tasks are discussed, including installation, file systems, user accounts, system accounting, performance monitoring, device management, and security. Advanced topics covered in the series include how to control UNIX programs, how to start and kill programs, and prioritizing processes.