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Hardware and Multimedia - PowerPoint PPT Presentation

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Chapter 4. Hardware and Multimedia. Objectives. Explain differences between Mac and Windows computers Describe input and output devices Compare types of storage devices Describe processing components Discuss how computers are connected. Personal Computers (PCs).

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Chapter 4

Hardware and Multimedia

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  • Explain differences between Mac and Windows computers

  • Describe input and output devices

  • Compare types of storage devices

  • Describe processing components

  • Discuss how computers are connected

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Personal Computers (PCs)

  • PCs are computers that can be:

    • Used by individuals at home, work, or school

    • Desktop models or portable laptop models

      • Also hand held models - pda

    • Connected to a server in a network

      • Server – computer that manages files and other resources for a network

  • What is the difference between Mac and PC?

    • The operating system

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What are operating systems?

  • Operating systems enable computers to run software and perform basic tasks.

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PC Operating Systems

  • One of the principal differences among computers is the operating system.

    • Most personal computers use Windows or Macintosh (Mac OS) operating systems.

    • Windows and Mac OS operating systems are not compatible.

      • Therefore, the hardware that they use may or may not be compatible

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Types of Hardware

  • Input

  • Output

  • Storage

  • Other…

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What is input?

  • Input is any information put into a computer.

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Input vs. Output

  • Input Device

    • Anything that lets you tell the computer what to do

  • Output Device

    • What the computer gives you back

  • Examples…

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Input Devices

  • Common input devices are:

    • Keyboards and keypads

    • Mice, trackballs, and touchpads

    • Microphones, digital recorders, synthesizers, and musical keyboards

    • Digital still cameras, digital camcorders, and Webcams

    • Graphics tablets and scanners

    • Game controllers

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Scanners and Cameras

  • Allows you to add images

  • OCR

    • Optical Character Recognition

    • scan in documents

  • Flatbed = more reliable results

  • Cameras

    • Less than 3.0 Meg not good for printing

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Output Devices

  • Output is any information that a computer produces. Common output devices are:

    • CRT (desktop) or LCD (laptop) monitors

    • Touch screens, plasma displays, LED displays, and projectors

    • Ink-jet or laser printers

    • Speakers

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Some other terms

  • Peripherals

    • Hardware that attaches to your PC

  • System Unit

    • “Tower”

    • Desktop

    • Laptop

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Floppy Disks




Wireless Card

Cable Modem

The other stuff…

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Storage Devices

  • Digital storage devices allow you to save your work. Common storage devices are:

    • Hard drives, which are built in the computer

    • Removable storage disks

      • CDs

      • DVDs

      • floppy disks

  • Zip disks

  • memory cards

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Floppy Disks

Store 1.44 MB


Store 650 MB


17 GB

Key Drives, ROM, RAM, Memory cards


Storage media

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What do all those numbers mean?

433 MB Processor

  • 40 gig hard drive

  • 1.2 Gig Hertz

  • 1.44 Megabytes

  • 3.2 Mega Pixel

40 Gig Hard Drive



Gig Hertz

52 K Modem

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Gig – Billion

Mega – Million

Kilo – Thousand


Measure of Speed


Packet of information


Little spots of color on a picture

Numbers (cont.)

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Processing Components

  • Processing includes all the calculations and other operations a computer performs. It depends on:

    • Microprocessors, or chips

    • A central processing unit (CPU)

    • Random-access memory (RAM)

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  • Controls computers logic and its ability to carry out instructions from software

  • Typically a single chip

  • Part of the motherboard

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Other Chips

  • Other chips on the motherboard:

    • RAM – random access memory

      • What is active while you are using the data

      • Also known as temporary memory

      • New pc’s usually have 256 MB or more

      • More ram = more tasks computer can perform at once

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Computer Networks

  • In order to exchange files and share resources, computers:

    • Require special input and output devices

    • Must be part of a network, such as:

      • The Internet

      • Local area networks (LANs)

      • Wide area networks (WANs)

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Connecting to Networks

  • Computers can be linked to the Internet or a network through:

    • A dial-up or broadband connection using a modem

    • A network interface card (NIC)

    • A router

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  • DSL

    • Digital Subscriber lines

    • Range usually of about 3 miles (if its clear)

  • Benefits

    • Always on

    • Much faster

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For dialup – uses telephone line

For broadband – uses cable or satellite modem

For wireless connections

Use cell phone technology

Network cards

Need network interface card to connect to a network

Need Routers to connect two or more LANs

Devices for Communications

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Objectives Revisited

  • Explain differences between Mac and Windows computers

  • Describe input and output devices

  • Compare types of storage devices

  • Describe processing components

  • Discuss how computers are connected