This instructional guide, one of a series developed by the Technical Education Advancement Modules (TEAM) project, is a 3-hour introduction to computers. The purpose is to develop the following competencies: (1) orientation to data processing; (2) use of data entry devices; (3) use of computer menus; and (4) entry of data with accuracy and positive feedback. The TEAM project is intended to upgrade basic technical competencies of unemployed, underemployed, and existing industrial employees. The materials in this module serve as a student outline and an instructor guide. The manual includes six sections: (1) computer hardware; (2) storage and memory capability; (3) processing cycles--processing, input, and output; (4) operating system software and hardware; (5) system start-up; and (6) data entry exercise. (NLA)