IT Essentials: PC Hardware and Software Labs and Study Guide, Third Edition, is designed as a valuable teaching and learning tool, incorporating new features to improve your hands-on skills and reinforce the key topics of the course. Each chapter contains a Study Guide section and a Labs section. The Study Guide section is designed to provide additional exercises and questions to reinforce your understanding of the course topics, preparing you for the course assessments and focusing on preparing for the associated certification exams. The IT Essentials: PC Hardware and Software version 4 course in the Cisco® Networking Academy® is designed to prepare you to take and pass the CompTIA A+ exams based on the 2006 objectives. You must pass both the A+ Essentials and one of the technician exams to earn the A+ certification. Chapters 1 through 10 cover the foundational knowledge that aligns with the CompTIA A+ Essentials exam (220-601). Chapters 11 through 16 explore more advanced concepts in greater depth to prepare you for the specialized CompTIA A+ technician exams (220-602 for IT Technician, 220-603 for Remote Support Technician, and 220-604 for Bench Technician).