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Computer concepts nballsgtc
1. Computers in Your World
Digital revolution – Change brought on by use
of digital technology/devices
Digital technology as a part of daily life
Computer Concepts – Illustrated 9th Edition 1
Figure A-1: Computers are a part of daily life
2. Computers in Your World
(continued)
Computer - An electronic device that:
Accepts input
Processes data
Stores data
Produces output
Computer Concepts – Illustrated 9th Edition 2
3. Computers in Your World
(continued)
Computer system includes:
Hardware - Electronic and mechanical parts
System Unit – Houses important components
Peripheral devices – Hardware to expand
functionality
Software – Programs/codes of instructions
Computer Concepts – Illustrated 9th Edition 3
4. Computers in Your World
(continued)
Input devices:
Keyboard
Mouse
Touch screen, etc.
Output devices:
Monitor
Printer
Speakers, etc.
Computer Concepts – Illustrated 9th Edition 4
5. How Computers Work
Turn on/power up/booting a computer:
May need to enter user ID and password
Computer program/software:
Instructions telling a computer how to carry
out processing tasks
Computer Concepts – Illustrated 9th Edition 5
7. Computer Concepts – Illustrated 9th Edition 7
Input Devices (continued)
Other pointing devices:
Pointing stick
Touchpad (also called a trackpad)
Trackball
Touch screen
Other ways to input data:
Scanner
Microphone
Digital camera
8. Computer Concepts – Illustrated 9th Edition 8
Display Devices
Monitor:
Standalone display device
Found with desktop computers
Screen:
Area where output is displayed
• Monitors attached to desktop computers have
screens
• Notebook computers have screens, but not
monitors
9. Computer Concepts – Illustrated 9th Edition 9
Display Devices (continued)
LCD (liquid crystal display):
Manipulates light within a layer of liquid crystal
cells
Also called flat-panel displays
LED (light emitting diodes)
OLED (organic light emitting diodes):
Used by most handheld devices
Draws less power than LCD screens
Can be seen from any angle
11. Computer Concepts – Illustrated 9th Edition 11
Printers (continued)
Printer resolution:
Determines the quality of printed output
Measured in dots per inch (or dpi)
Printer speed:
Pages per minute (ppm)
Duplex printer:
Prints on both sides of paper
Network-enabled printer
Photo printer
12. Computer Concepts – Illustrated 9th Edition 12
Printers (continued)
Printer resolution:
Determines the quality of printed output
Measured in dots per inch (or dpi)
Printer speed:
Pages per minute (ppm)
Duplex printer:
Prints on both sides of paper
Network-enabled printer
Photo printer
13. Computer Concepts – Illustrated 9th Edition 13
Figure B-9: An ink jet printer Figure B-10: A laser printer
14. Computer Concepts – Illustrated 9th Edition 14
Data Storage – An Overview
Storage technology - Data storage system:
Allows for a computer or digital device to store
and retrieve data
Storage medium:
Holds data – Hard drive, tape, memory card,
flash drive, CD, DVD, etc.
Storage device:
Stores and retrieves data from its storage
medium – CD/DVD drive.
15. Computer Concepts – Illustrated 9th Edition 15
Figure B-12: Examples of storage media and storage devices
16. Computer Concepts – Illustrated 9th Edition 16
Data Storage – An Overview
(continued)
Hard drives – Internal or External:
Main storage system for PCs
Mechanical or solid state drives (SSD)
• Solid state technology – No moving parts
Additional storage devices:
USB flash drives
CD/DVD/BD drives
Solid-state card readers
17. Computer Concepts – Illustrated 9th Edition 17
Figure B-13: Inside of a mechanical hard drive
18. Computer Concepts – Illustrated 9th Edition 18
Figure B-23: Solid state cards
Figure B-26: Examples of solid-state drives
19. Computer Concepts – Illustrated 9th Edition 19
Computer Software
Software/computer programs
Provides instructions and data necessary to
carry out tasks
Graphical user interface (GUI)
Allows for computer commands to be
executed using pointing devices and on-
screen graphics
19
20. Computer Concepts – Illustrated 9th Edition 20
Computer Software (continued)
Two major categories of software:
System software – used by the computer to
perform computer-specific tasks
• Operating systems
• Utilities
• Device drivers
Application software – allows users to
complete tasks on a computer
• Document production
• Communications
20
22. Computer Concepts – Illustrated 9th Edition 22
Computer Software (continued)
Local application
Installed directly on a computer
A Web application (Web app) or cloudware
Accessed using the Web
Portable application
Can run from a removable device
Mobile application or app
Runs on a smart phone or tablet
22
24. Computer Concepts – Illustrated 9th Edition 24
Licenses and Copyrights
Copyright
Legal protection of an author’s original work
Software license or
license agreement
Legal contract
defining how a
computer
program
can be used
24
Figure C-5: Microsoft Office 2010 software license
25. Computer Concepts – Illustrated 9th Edition 25
Licenses and Copyrights (continued)
Legal software categories:
Public domain software – not protected by
copyright
Proprietary software – copyright restricts use
Types of software licenses:
Single-user license
Site license
Multiple-user license
Concurrent-use license
25
26. Computer Concepts – Illustrated 9th Edition 26
Licenses and Copyrights (continued)
Commercial software – purchase right to use
Demoware – use for a trial period
Shareware – try first and then can purchase
Freeware – free to use but still need a license
Open source – program
code/instructions available
for modification
26
Figure C-4: Open Source Initiative
27. Computer Concepts – Illustrated 9th Edition 27
Operating Systems—An Overview
Operating System
(OS) – Master
controller for
all computer activities
Controls user-to-
digital-device
interaction
Controls digital-device-
to-digital-devices
interaction
27
Figure C-11: Example of how the operating system works
28. Computer Concepts – Illustrated 9th Edition 28
Operating Systems—An Overview
(continued)
Operating System
allow users to
perform specific
tasks
28
Table C-2: Ways you can use an operating system
29. Computer Concepts – Illustrated 9th Edition 29
Office Productivity Software
Office productivity software
Designed to be used in an office
Integrates word processing, spreadsheet,
database, drawing, presentation capabilities
29
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Office Productivity Software
(continued)
Word processing software
Used to produce documents
Microsoft Word, OpenOffice Writer
30
Figure C-24: Checking the spelling of a document in Microsoft Word
31. Computer Concepts – Illustrated 9th Edition 31
Office Productivity Software
(continued)
Spreadsheet software
For projects with repetitive calculations
Microsoft Excel, OpenOffice Calc
Worksheet – grid of columns and rows
31
Figure C-25: A spreadsheet in OpenOffice Calc
32. Computer Concepts – Illustrated 9th Edition 32
Office Productivity Software
(continued)
Database software
Used to create a collection of data that is
stored electronically as a series of records in
tables
Microsoft Access,
OpenOffice Base
32
Figure C-27: Creating a table in Microsoft Access
33. Computer Concepts – Illustrated 9th Edition 33
Office Productivity Software
(continued)
Presentation software
Provides all the tools needed to make a series
of electronic slides
Microsoft PowerPoint, OpenOffice Impress
33
Figure C-28: A slide in a Microsoft PowerPoint presentation
34. Computer Concepts – Illustrated 9th Edition 34
Graphics Software
Graphics
Picture, drawing, sketch, photograph, image,
or icon on screen or printed output
Graphics software
Helps you create, display, modify, manipulate,
and print graphics
34
35. Computer Concepts – Illustrated 9th Edition 35
Graphics Software (continued)
Paint or image editing software – used to
create more sophisticated images
35
Figure C-30: Paint software
36. Computer Concepts – Illustrated 9th Edition 36
Graphics Software (continued)
Photo editing software – used to enhance
quality of photos
36
Figure C-31: Photo editing software
37. Computer Concepts – Illustrated 9th Edition 37
Graphics Software (continued)
Clip art – readily available images used with
productivity software
37
Figure C-32: Inserting clip art in a presentation
38. Computer Concepts – Illustrated 9th Edition 38
Graphics Software (continued)
3D graphics software - computer aided design
(CAD) software
38
Figure C-33: 3D graphics created using software programs