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Cheap Computer Contest
Hardware
The physical components of a computer
system.
Examples: Motherboard, DVD Burner, RAM
CPU, and etc.
Software
Computer programs; instructions that make
hardware work.
Example: Microsoft PowerPoint, Adobe
Acrobat, AppleWorks
Question: Is an Operating System software?
Keyboard-Standard
Keyboard-Ergonomic
Keyboard
A hardware unit with a set of switches that
resembles a typewriter keyboard and that
conveys information from a user to a
computer or data communications circuit.
Mouse
Scroll Ball
Right Click
Left Click
Mouse
A common pointing device. The basic features of a
mouse are a flat-bottomed casing designed to be
gripped by one hand, one or more buttons on the
top, a multidirectional detection device
Monitor-Cathode Ray Tube
(CRT)
• Display device that uses a cathode-ray
tube to produce a picture
Monitor-Liquid Crystal Display
(LCD)
• an electronic display that consists of
segments of a liquid crystal whose color
varies according to the voltage applied to
them
Housing the System
 Computer Case
 Power supply
Case
• Houses the hardware
• Creates good air flow to keep hardware cool
• Creates a mounting point for hardware
• Protects hardware from outside interference
Power Supply
 Converts 120volts AC into
– 12 volts DC
• Runs Fan, DVD rom, CD rom, hard drive,
Motherboard
– 5 volts DC
• Mouse
– 3.3 volts DC
• Runs the RAM
Backbone of the Computer System
 Motherboard
 Central Processing Unit (CPU)
– CPU FAN and Heat Sink
 Random Access Memory (RAM)
Motherboard
 The Motherboard allows all the
components in the computer system to
interact with one another
Central Processing Unit (CPU)
 This Hardware component is the brain
of the computer system
– The CPU device that interprets and
executes instructions
 The CPU produces as much heat as a
100 watt light bulb
CPU Fan with Heat sink
 Used to Pull the heat away from the
CPU and keeping the CPU temperature
at 95 Fahrenheit
Random Access Memory
(RAM)
 Also Known as MEMORY-PC
 Allows for information to be written to and
read instantly
 You DO NOT want to buy the cheapest brand
– Three Good Brands
• Kingston
• PONY
• Samsung
PCI and AGP Cards
 Network Adaptor
 Sound Card
 Video Card
Video Card
 Connected to the AGP slot on the
motherboard
 Designed to generate output for the
system's video display screen
Network adaptor
 Connected to a PCI slot on the motherboard
 Allows you to access the internet
 Can transfer 10/100mbps of data
Sound Card
 Connected to a PCI slot on the
motherboard
 Designed to produce or reproduce
sound
Storage Devices
• USB Flash Drive
• DVD+/-RW
• Hard drive
USB Flash Drive
• Storage device that is inserted into a
computers USB port
• Data is stored in flash memory
• Data is stored and read electronically
DVD burner
• Stores up to 4.5 gigabytes of data on
DVD media
• Uses a laser to burn an image onto
DVD or CD
• One DVD =7CDs
• One CD =447 3.5 Floppy disks
Hard Drive (EIDE)
 The faster the Hard Drive spins the
faster you will be able to access the
Data stored on it
 7200rpms is a speed to look for
Operating System
The purpose of an operating system is:
– to organize and control hardware and software
so that the device it runs on, ßbehaves in a
flexible but predictable way.
Graphical User Interface (GUI)
– GUIs display visual elements such as icons and
windows
Operating System Choices
Unix
Windows NT
Linux OPENSUSE