Vocabulary Practice (Desktop Computer) | Basic Computer Skills, Lesson 1: Devices and Computer Log OnVersion en ligne To identify the external parts of a computer par hollis sankar 1 monitor 2 system unit 3 system unit power button 4 keyboard 5 monitor power button 6 mouse Explanation 1 The monitor shows information from the computer. 2 The system unit is the brain of the computer. 3 The system unit's power button turns on and off the system unit. 4 The keyboard is a place to type on a computer. 5 The monitor's power button turns on and off the monitor. 6 The mouse moves the cursor.