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How to study your flashcards.
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84 Cards in this Set
- Front
- Back
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Computing Cycle
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input, processing, output
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A. Input Devices
Most Common: |
Keyboard
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Keyboards:
QWERTY |
Standard keyboard;
named due to top left letters on first row under numbers |
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Keyboards:
Dvorak |
Studied keyboard & realigned keys/letters to prevent repetitive stress.
1. Example of repetitive stress: Carpal Tunnel (occurs in wrists due to typing) |
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Keyboards:
c. Ergonomic |
designed to help prevent stress injuries
Example: elevated lower keyboard area where wrist rests, twisted for arm comfort |
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Mouse (Mice):
Ball Mouse |
Has a ball that rolls
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Mouse (Mice):
Optic Mouse |
Infrared; laser
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Mouse (Mice):
Button Mouse |
1. Two Button
2. Three Button 3. Scroll d. Wireless e. Bluetooth f. USB g. Serial h. Magic (Apple Only) |
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Other Input Devices
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> Touchpad
> Trackballs > Wacom tablet > touch screen > remote > trackpoint |
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Types of Clicks:
Left Click |
selects
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Types of Clicks:
Right Click |
context sensitive menu
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Types of Clicks:
Double Left Click |
open or launch
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Output Devices
Monitor |
> Most common output device
> Measured diagonally |
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Monitor:
Pixels |
individual measurement for resolution
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Monitor:
Resolution |
measured by number of pixels
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Monitor:
VGA |
video graphics array
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Monitor:
SVGA |
Super video graphics array
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Monitor:
XGA |
extended video array
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Monitor:
Monochrome Monitor |
Single color
ex: green/black or amber/black |
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types of Monitors:
VDT |
Video Display Terminal
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types of Monitors:
CRT |
Cathode Ray Tube
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types of Monitors:
Flat Panel |
All others that are not CRT (LED, LCD, 3D)
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Notebooks:
Active Monitor |
Look at it from side & see it clearly
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Notebooks:
Passive Monitor |
Look at it from the side & its fuzzy
>>Neither one is better or worse when looking directly at screen |
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Printer types:
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Impact and Non Impact
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IMPACT Printer:
Ribbon |
film
ink |
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Impact Printer:
Best Quality |
Daisy Wheel
didn’t do graphics. |
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Impact printer:
Pin Printer (Dot Matrix) |
NO COLOR, SLOW, NOISY
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Impact printer:
9 pin |
Resolution 180x180
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Impact printer:
24 pin |
Resolution 300x300
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Impact printer:
Type set Quality |
Resolution 2500 x 2500 (64 times better than Dot Matrix)
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NON-IMPACT printer:
Ink (InkJet, DeskJet) |
Resolution is better than a Dot Matrix (usually 720x720)
Ink is heated and by pressure prints on to paper PRINTS COLOR * type of printer used for portraits at funeral homes |
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NON-IMPACT printer:
Laser |
Uses a dry toner (powder) Resolution usually 1200x1200
Heat seals it BLACK AND WHITE & COLOR |
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NON-IMPACT printer:
Wax |
usually in very expensive printers
Example: Xerox Color Cube Phaser Solid wax, heats and transfers |
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Processing:
CPU |
Central Processing Unit “Processor”
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2 Companies that make CPU
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1. AMD – American Micro Device (Athelon, Duron,etc)
2. Intel (Core, DuoCore, Pentium) >>Speed it runs at is Ghz (higher speed, better but more $$$) |
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Processing:
Cache Memory |
Helps processor run better/faster
|
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Processing:
ALU |
Arithmetic Logic Unit (processor that does computations) ::::
WHERE THE PROCESSING IS DONE |
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Processing:
CU |
Control Unit (reads instructions & directs)
IT UNDERSTANDS EXECUTIONS Originates on a Binary System (Only two numbers – 0 & 1) Smallest unit of memory called a bit (holds a 0 or 1) |
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8bit =
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1 byte – holds characters
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kb – kilobyte =
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1000 bytes – 2 to the 10th power
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mb – megabyte =
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1 million bytes – 2 to the 20th power
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gb – gigabyte =
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1 billion bytes – 2 to the 30th power
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tb – terabyte =
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1 trillion bytes – 2 to the 40th power
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RAM
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Random Access Memory (usually measured in gigabytes)
Really fast but temporary Primary Memory of computer – Operating system and documents created here |
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Secondary Memory
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anything you can recall from
Examples: hard drive, CD-R, DVD-R, thumb drive, etc. |
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Secondary storage devices (2 categories):
Magnetic |
flash drives, tapes, cassettes
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Secondary storage devices (2 categories):
Optical |
DVD, CD, Blueray
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CD-ROM
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Read Only Memory
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CD-R
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Can record once 700mb
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CD-RW
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Can record and rewrite if proper disc is used
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DVD +/-R
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same as above 4-8gb
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BLUERAY
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35+gb
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Backup
|
An extra copy
|
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Backup:
Tape Drive |
made to hold storage for roughly7yrs
|
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Backup:
Optical Drive |
can hols storage for about 20yrs
|
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Peripheral Device
|
anything connected to tower that connects by ports
|
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Ports:
Parallel |
(abbreviated LPT) –
printers used this years ago |
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Ports:
Serial |
modems connect with this (COMI , Mouse)
|
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Ports:
SCSI |
“skuzzy”
(Small Computer System Interface) –Scanners |
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Ports:
PS2 |
Mouse (changed from a serial port to this) – This port also provides power
to device. |
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Ports:
USB |
(Universal Serial Bus) – what pretty much everything uses today.
Can use a Hub to create 256 devices connected by one USB Port |
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Ports:
Firewire Port |
rapid data transfer capability
|
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Ports:
Video Port |
Monitor
|
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Ports:
Audio |
Microphone and Speakers
|
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Ports:
PCMCIA Slot |
(Personal Computer Memory Card International Association)
can be used for memory cards, modems & broadband cards -FOUND PRIMARILY IN NOTEBOOK COMPUTERS- |
|
Files and Filenames :
DOS |
Disc Operating System
Limited to 8 character filename with a 3 letter extension |
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Files and Filenames :
GUI |
Graphical Interface System
Graphics based |
|
Files and Filenames :
Long File Names |
256 Character limit
Introduced with Windows |
|
Extensions assigned to show program you are using:
.jpg |
picture or graphic file
|
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Extensions assigned to show program you are using:
.tif |
picture or graphic file (usually used for memory portraits)
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Extensions assigned to show program you are using:
.exe |
executable file
|
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Extensions assigned to show program you are using:
.doc |
Microsoft Word 97-2003
|
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Extensions assigned to show program you are using:
.docx |
Microsoft Word 2007+
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Extensions assigned to show program you are using:
.xls |
Microsoft Excel
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Extensions assigned to show program you are using:
.xlsx |
2010 Microsoft Excel
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Extensions assigned to show program you are using:
|
portable document filev
|
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Drives:
C: |
called a drive when a colon is behind it (Main Hard Drive)
|
|
Drives:
A: & B: |
reserved for floppy drive (CD, DVD, Readers)
|
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Drives:
C:\ |
root folder (root directory) – contains all files & folders
C:\mydocuments\tests\compsci\exam1.doc |
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Drive:
C:\ Parent Directory |
mydocuments
C:\mydocuments\tests\compsci\exam1.doc |
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Drive:
SubFolder of My Docs |
tests
C:\mydocuments\tests\compsci\exam1.doc |
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Drive:
SubFolder of Tests |
compsci
C:\mydocuments\tests\compsci\exam1.doc |
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Drive:
Actual Document |
exam1
C:\mydocuments\tests\compsci\exam1.doc |
