IS 2101---Fall 2009

Chapter 38/31/2009

IS 2101/01---Fall 2009 2

LOOKING AT THE PARTS

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3IS 2101/01---Fall 2009

Sound

• Analog to Digital for input• Digital to analogue for output–Wave synthesis–MIDI– Sound samples

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4IS 2101/01---Fall 2009

Overview Of System Parts

• CPU• Motherboard• Memory• Secondary Storage• Buses• Cache• Expansion cards

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5IS 2101/01---Fall 2009

Central Processing Unit

• What does the CPU do?• Different brands of CPU• Processing power• Multi-core

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6IS 2101/01---Fall 2009

Primary Memory

• RAM• ROM– PROM– EPROM

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7IS 2101/01---Fall 2009

Enough RAM

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8IS 2101/01---Fall 2009

Using The Task Managere

• Invoking the Task Manager• Applications• Processes– Caution

• Performance

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9IS 2101/01---Fall 2009

Secondary Storage

• Magnetic• Optical– DVD/CD– Read, write, rewrite

• Flash memory–Writing is slow– Reading is much faster

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10IS 2101/01---Fall 2009

Adding Storage

• Adding a hard drive• Adding or replacing the CD/DVD

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11IS 2101/01---Fall 2009

More Parts

• Buses to connect• Cache to store temporarily

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12IS 2101/01---Fall 2009

Evaluating the System

• System properties– Right-click My Computer

• Disk properties– Right-click the disk icon in My Computer

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13IS 2101/01---Fall 2009

Start Here 9/2

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14IS 2101/01---Fall 2009

Communication

• A port is a physical connector used by the computer to communicate with other devices

• Parallel• Serial– USB

• Network– Ethernet

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15IS 2101/01---Fall 2009

Communication

• Some communication is not over physical wires or cables

• Wireless ethernet• Bluetooth• Infrared

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16IS 2101/01---Fall 2009

Expansion Cards

• Generally used to provide connections to external devices

• Graphics cards for connecting to monitors

• Network cards

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17IS 2101/01---Fall 2009

Software

• Application software• System software– Firmware– Operating system– Utilities

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18IS 2101/01---Fall 2009

Operating Systems• Provides the foundation for all other

software• Application Programmer’s Interface• User interface to control the system– GUI– Command line

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19IS 2101/01---Fall 2009

Different OS’s

• Different hardware• Different services and resources

provided• Some are free

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20IS 2101/01---Fall 2009

Common OS’s

• Microsoft Windows– Intel type CPU’s

• OS/X–Macintosh

• Linux– Numerous processors supported–Many free versions

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21IS 2101/01---Fall 2009

Some Utilities

• Disk Defragmenter• Task manager• Task scheduler• Backup

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22IS 2101/01---Fall 2009

Some Applications

• Productivity software• Entertainment software• Development software

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23IS 2101/01---Fall 2009

Some Productivity Software

• Spreadsheet• Word processing• Database• Presentation• Communication (e-mail)• Image manipulation

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24IS 2101/01---Fall 2009

Networks

• Extent– Local area–Wide area– Internet: a confederation of local area

networks

• Topology– Bus: shared communication line– Others: star, ring

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25IS 2101/01---Fall 2009

Safe Practices

• Maintenance– Backups– Updates

• Malware– Viruses– Spyware

• Hacking– Firewalls

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26IS 2101/01---Fall 2009

Ergonomics

• Figure 37 on page 135• Wrist support on keyboard– And mouse

• Monitor at eye level or below• Legs at comfortable angle

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