CHAPTER 3 - CHAPTER 3 THE VISIBLE PC Learning Objectives In...

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CHAPTER 3 CHAPTER 3 THE VISIBLE PC THE VISIBLE PC
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Learning Objectives In this chapter, you will learn how to • Describe how the PC works. • Identify all the connectors and devices on a typical PC system unit. • Discuss the major internal components of a PC.
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How the PC Works The PC is a computer: a machine that enables you to do work, produce documents, play games, balance your checkbook, and look up the latest sports scores on the Internet. it’s also programming: the commands that tell the computer what to do to get work done. These commands are just ones and zeros that the computer’s hardware understands
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How the PC Works Programming comes in two forms: applications: the programs that get work done. operating system (OS): main program to support the applications.
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How the PC Works From the CompTIA A+ tech’s perspective, the computer functions through four stages: Input Processing Output Storage
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INPUT Various pieces of hardware enable you to input data, the most common of which are the keyboard and mouse.
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PROCESSING the computer processes your data. Processing takes place inside the system unit— the box under your desk. The processing portion is the magical part—you can’t see it happen. Processing takes place somewhere in here!
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OUTPUT Often it places data on the monitor send the data over to the printer so you can print out copies Printer Speaker Monitor Output Devices
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STORAGE The fourth stage in the computing process is storage . To keep permanent records and keep a copy of a files. Typical storage (CD-R discs)
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The Complete PC typical PC is more than one device, and you need all of the parts (or at least most) to make the PC work. The most important part of the PC is the box that usually sits under your desk: the one that all of the other parts connect to, called the system unit. All of the processing and storage takes place in the system unit.
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The Complete PC All of the other parts of the PC—the printer, the keyboard, the monitor—connect to the system unit and are known collectively as peripherals. Most computers have a standard set of peripherals to provide input and output. Monitor - The big television thing that provides a visual output for the computer Keyboard Keypad for providing keyed input. Based on a typewriter Mouse Pointing device used to control a graphical pointer on the monitor for input Speakers/headphones Speakers provide sound output Printer Provides printed paper output
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External Connections Connections in the back of a PC Every peripheral connects to the system unit through one of the many types of ports.
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