Lesson 1: Introduction to Computers. Objectives 1.1. Describe the importance of computers in today's world. 1.2. Identify the main parts of a computer. 1.3 Identify the steps for starting and shutting down a computer. 1.4 Identify the different groups of keys on a keyboard. 1.5 Perform different tasks by using a mouse. 1.6 Describe other …