This is a guide for use by those making the transition from VMS to UNIX. Each concept is illustrated with one or more examples comparing the way a task is performed in VMS and in UNIX. The book progresses in a logical sequence from fundamental concepts to advanced programming and networking. Based on the Berkeley 4.2 version of UNIX, the text includes more than 150 interactive examples as well as appendixes providing command summaries and useful cross-reference tables.