Welcome to the A+ Certification Training Kit. This technology-based training kit is intended to provide the user with the skills necessary for A+ Certification. It is a study of the computer—its hardware and software—from its earliest beginnings, through the advent of the mainframe and personal computers, up to present-day Pentium processor-driven machines.

The computer industry has evolved and grown phenomenally since its commercial inception in the 1960s. This industry is so vast and complex that no one can claim to understand all its aspects. However, to participate in this ever-changing and growing industry, the computer technician must be able to demonstrate a level of proficiency with computers and technology. Certification is a first step in establishing your presence as a computer professional. It provides you with the opportunity to gain the skills you need, it helps you establish your knowledge base, and it gives you the confidence to get started.

This book was developed for the entry-level computer technician, as well as the experienced technician who is seeking certification. For the entry-level student, it starts by explaining the basics and moves on to more complex topics. It introduces the simple concepts that underlie today's computers. Once this foundation is established, it brings you up to date with the latest technology covered by the A+ exam. For the more experienced user, it provides a fresh review and focus on what is required to meet the objectives of the A+ exam.