This occupational analysis data was assembled to help instructors develop a course of study for commercial cleaners at the entry level. Following a job description for an institutional or commercial cleaner, the remainder of the content in standard task-analysis format presents an analysis of ten commercial cleaner duties (tasks). Each of ten duties is broken down into its components (one or more sub-tasks) and for each sub-task the following are given: task statement; tools, equipment, materials, objects acted upon; steps; safety-hazards, decisions; cues; errors; science skills/concepts; math-number systems skills/concepts; and communications (includes performance modes, examples, and skills/concepts). The commercial cleaner duties covered are caring for rooms, maintaining floors, caring for fabric surfaces, cleaning the bathroom, cleaning special items, cleaning special areas, cleaning waste receptacles, caring for cleaning equipment, controlling pests, and maintaining records. The sub-tasks for cleaning a guest room, cleaning discharge units, and cleaning occupied units are appended. (EM)