1. 5 (Hardware) (peripheral) (input unit ) CPU

2. (Software) (Software) (Programming Language) (Programmer) (SystemSoftware ) ( Application Software ) 3. (People ware) (user) (computer user) (power user) (computer professional) (programmer) 1. (Data Entry Operator) 2. (Application Programmer) (System Programmer) 3. (System Analyst and Administrator) (System Engineer) (Database Adminstrator) 4. (Computer Operator) 5. (EDP Manager) (Data / Information) 4. (relevant) (timely) (accurate) (concise)(complete) (Procedure) - 1. 2. 3. 4. 5. 6. 5. (Operation Manual) (User Manual)