Hardware and Multimedia

1
Hardware and Multimedia

• Chapter 4

2
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

3
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

4
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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Input
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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
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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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The Tower
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The other stuff

• Storage
• Memory
• Floppy Disks
• CDs

• Communication
• Modem
• Wireless Card
• Cable Modem

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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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Storage media

• Floppy Disks
• Store 1.44 MB
• CDs
• Store 650 MB
• DVDs
• 17 GB

• Key Drives, ROM, RAM, Memory cards
• Vary

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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
Megabyte
Megahertz
Gig Hertz
52 K Modem
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Numbers (cont.)

• Gig Billion
• Mega Million
• Kilo Thousand

• Hertz
• Measure of Speed
• Byte
• Packet of information
• Pixel
• Little spots of color on a picture

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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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CPU

• 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 pcs 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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Broadband

• DSL
• Digital Subscriber lines
• Range usually of about 3 miles (if its clear)
• Benefits
• Always on
• Much faster

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Devices for Communications

• Modems
• 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

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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