Measures of Dispersion and Variability: Range, QD, AD and SD
Computer Basics
1.
2. Help us perform tasks efficiently and
quickly
Are used in almost every field/industry
Made of various parts
› Input devices
› Output devices
› Processing devices
› Storage devices
3. Hardware
› “Refers to all the physical
components connected to a
computer” (microsoft.com)
4. Input Devices
Mouse
Keyboard
Microphone
Scanner
Webcam
Stylus
Digital Camera
Output Devices
Monitor
Printer
Speakers
Headphones
Projector
5. Processing Devices
CPU
Memory
Motherboard
Video Card
Network Interface Card
Sound Card
Storage Devices
Hard Drive
Floppy Disk
CD-ROM
DVD-ROM
Jump Drive
6. This is the brain of
your computer.
It interprets and runs
the commands you
give the computer.
A processor these
days can have several
"cores," each of which
is similar to an
independent
processor.
7. Where information is stored and retrieved by the CPU.
RAM
(Random access memory)
› Main memory
› Temporary
› Only available when
computer is on
ROM
(Read only memory)
› Permanent
› Used to store commands
› Remains even when
computer is off
8. A large circuit board
inside a computer
Connects input, output
and processing devices
and tells the CPU how to
run.
9. Used to process
graphics
Because most of
today's programs are
graphically oriented,
the video card can
help almost any
program run more
efficiently.
10. Hardware that allows a
computer to be connected
to other computers (a
network) so information
can be exchanged
between them.
11. Converts audio signals to digital
signals that can be stored as a
audio file.
Converts audio signals to
electrical signals to play
through speakers or
headphones.
12. An input and output
device that can receive
and burn data.
13. Main storage device
on a computer
Stores the operating
system, the programs
and all of your
documents.
When your computer
powers down, the data
on a hard drive
remains intact.
14. CD-ROM
› Commonly stores music
or pictures
DVD-ROM
› Can store more data
than a CD-ROM
› Commonly stores
movies and videos
USB Flash Drive
› “Jump drive”
› Various sizes (4GB,
8GB, 16GB)
› Stores files, pictures,
videos, etc.
15. Software
› A collection of computer
programs and related data
that provide the instructions
for telling a computer what to
do and how to do it.
16. Provides the basic functions for computer
usage and helps run the computer hardware
and system.
› Device drivers
› Operating systems
› Servers
› Utilities
› Window systems
17. Provides tools to assist a programmer in writing
computer programs, and software using
different programming languages in a more
convenient way.
› Compilers
› Debuggers
› Interpreters
› Linkers
› Text Editors
18. Developed to aid in any task that benefits from
computation. It is a broad category, and
encompasses software of many kinds,
including:
› Business Software (QuickBooks, etc.)
› Databases
› Spreadsheets
› Video Games
› Productivity Programs (Word, PowerPoint,
Excel, etc.)
19. The most important software on
the computer.
Every computer must have an
operating system to run other programs.
Controls and manages the hardware
connected to the computer.
Helps organize and manage files and
folders.
20. Open (free)
Ubuntu
Linux
Closed ($$$)
Windows 8
Windows 7
Windows XP
Windows Vista
Snow Leopard
