A+ certification is the most popular certification program in the world, certifying more than 500,000 individuals since its inception in 1998. The two A+ exams certify your knowledge of basic computer hardware and operating systems. This certification is extremely popular because it is essential to anybody who requires a baseline set of skills or competencies: high school students, technicians in your company's IT support group, even those who are exploring IT careers. The A+ Training Guide provides focused, in-depth coverage of all the exam objectives, giving readers the ultimate study tool. Whether you're in need of supplementary study material or a hands-on guide for your shop, the best-selling Upgrading and Repairing PCs book completes this package. This book is found on the desks of teachers, students, hobbyists, repair technicians, and IT professionals. Maximum PC, the PC hardware industry's leading magazine has dubbed this guide the "most comprehensive book on the subject we've ever seen." World-renowned PC hardware expert Scott Mueller has taught thousands in his weeklong seminars and millions through his books, videos, and articles.