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  • CompTIA A+ 220-701 necessities examination, 2009 version: exam targets Mapped to Chapters
  • CompTIA A+ 220-702 useful program examination, 2009 version: exam goals Mapped to Chapters
  • Glossary


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Most processing and storage components are contained inside the case. The most important component in the case is the central processing unit (CPU), also called the processor or microprocessor. As its name implies, this device is central to all processing done by the computer. Data received by input devices is read by the CPU, and output from the CPU is written to output devices. The CPU writes data and instructions in storage devices and performs calculations and other data processing. Whether inside or outside the case, and regardless of the function the device performs, each hardware input, output, or storage device requires these elements to operate: A method for the CPU to communicate with the device.

Introduction to CompTIA A+ CompTIA A+ 2009 In Depth was written to be the very best tool on the market today to prepare you to support personal computers. Updated to include the most current technologies with a new chapter on securing your PC and small network and new content on supporting Windows Vista, this book takes you from the just-a-user level to the I-can-fix-this level for PC hardware and software matters. This book achieves its goals with an unusually effective combination of tools that powerfully reinforce both concepts and hands-on, real-world experiences.

Each CompTIA certification is vendor-neutral, covers multiple technologies, and requires demonstration of skills and knowledge widely sought after by the IT industry. org. CHAPTER 1 In this chapter, you will learn: • That a computer requires both hardware and software to work • About the many different hardware components inside of and connected to a computer Introducing Hardware L ike millions of other computer users, you have probably used your desktop or notebook computer to play games, update your blog, write papers, or build spreadsheets.

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