Transcript Chapter 4 Hardware and Multimedia - McGraw

Chapter 4
Hardware and
Multimedia
4
Personal Computers (PCs)
PCs are computers that can be:
Used by individuals at home, work, or
school
Desktop models or portable laptop
models
Connected to a server in a network
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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.
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What is input?
Input is any information put
into a computer.
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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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Output Devices
Output is any information that a
computer produces. Common output
devices are:
CRT or LCD monitors
Touch screens, plasma displays, LED
displays, and projectors
Ink-jet or laser printers
Speakers
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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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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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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