This handbook is the fourth in a series of five competency-based resource guides on microcomputer applications for vocational teachers. The six units of instruction in this handbook are concerned with the content of the seven competencies included in the category, "Planning and Organizing the Vocational Education Learning Environment for Competency-Based Instruction." Units are designed to prepare teachers to do the following: (1) develop a plan to implement competency-based instruction (CBI) in the vocational learning environment, (2) project resource needs for CBI, (3) provide microcomputer maintenance, (4) establish microcomputer user data security, (5) establish microcomputer hardware/software security, and (6) create authorized backup copies of microcomputer software. Components of each unit include unit and specific objectives, informative material, sample forms and evaluation measures, examples, a summary, achievement indicators, and a list of references. (YLB)