Computer Confluence 6/e Chapter 3 Computer Systems: The Sum of Its PartsSlide 2Slide 3Slide 4Slide 5Slide 6Computer Confluence 6/e Chapter 3 Inventing the Future: Tomorrow’s PeripheralsSlide 8Computer Confluence 6/e Chapter 3 Lesson SummarySlide 10Slide 11© 2005 Prentice-Hall, Inc. Slide 1Computer Confluence 6/e Chapter 3Computer Systems: The Sum of Its PartsPersonal Computers: basic design classesTower systemsTall, narrow boxes that generally have more expansion slots and bays than other designsFlat desktop systems Designed to sit under the monitor like a platformAll-in-one systems (like the iMac) Combine monitor and system unit into a single housing© 2005 Prentice-Hall, Inc. Slide 2Computer Confluence 6/e Chapter 3Computer Systems: The Sum of Its PartsPortable computers Include all the essential components, including keyboard and pointing device, in one compact box© 2005 Prentice-Hall, Inc. Slide 3Computer Confluence 6/e Chapter 3Computer Systems: The Sum of Its PartsPorts and Slots RevisitedThe system or motherboard includes several standard ports:Serial Port for attaching devices that send/receive messages one bit at a time (modems)Parallel Port for attaching devices that send/receive bits in groups (printers)Keyboard/Mouse Port for attaching a keyboard and a mouse© 2005 Prentice-Hall, Inc. Slide 4Computer Confluence 6/e Chapter 3Computer Systems: The Sum of Its PartsOther ports are typically included on expansion boards rather than the system board:Video Port used to plug in a color monitor into the video boardMicrophone, speaker, headphone, MIDI ports used to attach sound equipmentSCSI port allows several peripherals to be strung together and attached to a single portLAN port used faster connection to a local-area network (LAN)© 2005 Prentice-Hall, Inc. Slide 5Computer Confluence 6/e Chapter 3Computer Systems: The Sum of Its PartsExpansion Made EasyWith the PC open architecture and the introduction of new interfaces, you can hot swap devices.USB (Universal Serial Bus) transmits a hundred times faster than a PC serial portFirewire (IEEE 1394) can move data between devices at 400 or more megabits per secondHigh speed makes it ideal for data-intensive work like digital video FireWire 800Recently introduced on high-end Macintosh systems offers 800 Mbps transfer speeds© 2005 Prentice-Hall, Inc. Slide 6Computer Confluence 6/e Chapter 3Computer Systems: The Sum of Its PartsPutting It All TogetherA typical computer system might have several different input, output, and storage peripherals. The key is compatibilityNetworks blur the boundaries between computersNetworked computers may have access to all the peripherals on a systemThe computer is, in effect, just a tiny part of a global system of interconnected networks© 2005 Prentice-Hall, Inc. Slide 7Computer Confluence 6/e Chapter 3Inventing the Future: Tomorrow’s Peripherals Tomorrow’s StorageSmaller disks that hold more a single-electron memory chip the size of a thumbnail that can store all the sounds and images of a full-length feature film  Tomorrow’s Output Flat-panel screens are replacing desktop CRTs at an ever-increasing rateRetinal display that works without a screen You can count how many seeds are in the apple,but not how many apples are in the seed.—Ken Kesey, author of One Flew over the Cuckoo’s Nest© 2005 Prentice-Hall, Inc. Slide 8Computer Confluence 6/e Chapter 3Inventing the Future: Tomorrow’s PeripheralsTomorrow’s Input: SensorsMore sophisticated devices will serve as eyes, ears, and other types of sense organs for computer networks© 2005 Prentice-Hall, Inc. Slide 9Computer Confluence 6/e Chapter 3Lesson SummaryPeripherals allow computer to communicate with the outside world and store information for later use informationThe most common input devices today are the keyboard and the mouseA variety of other input devices can be connected to the computerA computer terminal is not some clunky old television with a typewriter in front of it. It is an interface where the mind and body can connect with the universe and move bits of it about.—Douglas Adams, author of The Hitchhiker’s Guide to the Galaxy© 2005 Prentice-Hall, Inc. Slide 10Computer Confluence 6/e Chapter 3Lesson SummaryOutput devices perform the opposite function: They accept strings of bits from the computer and transform them into a form that is useful or meaningful outside the computer. Storage devices are capable of two-way communication with the computer: Because of their high-speed random access capability are the most common forms of storage on modern computers.© 2005 Prentice-Hall, Inc. Slide 11Computer Confluence 6/e Chapter 3Lesson SummaryNetwork connections make it possible for computers to communicate with one another directly. As a rule, men worry more about what they can’t see than about what they can.—Julius