General Revision for AQA ICT GCSE

Short revision notes I made based on past exam papers, on many topics.

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  • Created by: amy
  • Created on: 19-06-10 14:52
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First 186 words of the document:

RAM ­ RANDOM ACCESS MEMORY
ROM ­ READ ONLY MEMORY
LAN ­ LOCAL AREA NETWORK
WAN ­ WIDE AREA NETWORK
VDU ­ VISUAL DISPLAY UNIT
DTP ­ DESKTOP PUBLISHING
RW ­ REWRITABLE
DVD ­ DIGITAL VERSATILE DISK
CPU ­ CENTRAL PROCESSING UNIT
OCR ­ OPTICAL CHARACTER RECOGNITION
OMR ­ OPTICAL MARK READER
MICR ­ MAGNETIC INK CHARACTER READER
WIMP ­ WINDOWS ICONS MENU POINTER
CD ­ COMPACT DISK
DVD ­ DIGITAL VERSATILE DISKS
WORM ­ WRITE ONCE READ MANY (TIMES)
OS ­ OPERATING SYSTEM
WYSIWYG ­ WHAT YOU SEE IS WHAT YOU GET
WWW ­ WORLD WIDE WEB
CAD ­ COMPUTER AIDED DESIGN
CAM ­ COMPUTER AIDED MANUFACTURE
CSV ­ COMMA SEPERATED VALUES
VR ­ VIRTUAL REALITY
IKBS ­ INTELLIGENT (or INFORMATION) KNOWLEDGE BASED
SYSTEM
ADC ­ ANALOGUE TO DIGITAL CONVERTER
DAC ­ DIGITAL TO ANALOGUE CONVERTER
ISP ­ INTERNET SERVICE PROVIDER
ADSL ­ ASYMMETRIC DIGITAL SUBSCRIBER LINE
ISDN ­ INTEGRATED SERVICES DIGITAL NETWORK
URL ­ UNIFORM RESOURCE LOCATOR
UGC ­ USER GENERATED CONTENT
EPOS ­ ELECTRONIC POINT OF SALE
EFTPOS ­ ELECTRONIC FUNDS at the POINT OF SALE
ATM ­ AUTOMATIC TELLER MACHINE

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Page 2

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PIN ­ PERSONAL IDENTIFICATION NUMBER
EDI ­ ELECTRONIC DATA INTERCHANGE
CAL ­ COMPUTER AIDED LEARNING
CMIS ­ COMPUTERISED MANAGEMENT INFORMATION
SYSTEMS
PC ­ PERSONAL COMPUTER
GIS ­ GEOGRAPHICAL INFORMATION SYSTEMS
RSI ­ REPETITIVE STRAIN INJURY
COM ­ COMPUTER OUTPUT on MICROFILM
CRT ­ CATHODE RAY TUBE
DBMS ­ DATABASE MANAGEMENT SYSTEM
HTML ­ HYPERTEXT MARK-UP LANGUAGE
HTTP ­ HYPERTEXT TRANSFER PROTOCOL
GIGO ­ GARBAGE IN GARBAGE OUT
LCD ­ LIQUID CRYSTAL DISPLAY…read more

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Data Protection Act
Data must not be processed unless there is a specific lawful
reason to do so.
Data must only be obtained and then used for specific
purposes.
Data should be adequate, relevant and not excessive for
specified use.
Data must be accurate and where relevant, kept up-to-date.
Data should not be kept longer than necessary for the
specified purpose.
Data processing should meet the legal rights of data subjects.
Data holders should protect the data against loss, theft and
corruption.…read more

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Fewer errors
Reduced storage space
Reduced data duplication
Modelling
Changing a variable or variables within a model
Looking at/analysing results of changes
Make decisions/predictions/more changes as result of
analysis/what if...…read more

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Adjustable monitors
Footrest
Wrist support
Ergonomically designed keyboard
Air con/ventilation
Secured leads/leads out of reach
Repair/report faults
Regular checks of equipment/working area
Use of blinds
Installation of additional sockets
Disadvantages of using email, not post
Not everyone has email
Email is susceptible to viruses
Can use tracking with post
Email needs computer/internet connection
Cannot send physical objects in email
LOGGING INTERVAL- the time taken between one reading
being taken and the next reading being taken
CALIBRATION- to correlate the readings of a sensor against
those…read more

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FEEDBACK- the continuous checking of data from sensors to
control the output of a computer system
OCR- a method of inputting data in which reflected light is
used to detect character patterns
CALIBRATION- a method of matching readings from a
seonbsor to an accepted scale in known units
SENSOR- an input device used to measure environmental
conditions
PERIOD OF LOGGING- the time taken between first reading
being taken and last reading being taken
Device used to measure temperature ­ THERMISTOR
Tasks carried out by operating…read more

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Outputs
Printer (dot matrix, laser, ink-jet)
Monitor (VDU)
Speakers
Plotter
Actuator
Projector
Motor
Storage Devices
Memory/USB sticks
CD-Rom
DVD-Rom
Hard disk
RAM
ROM
Floppy disk
Inputs
Mouse
Keyboard
Scanner
Graphics digitiser
Light pen
Sensor
Touch screen
Graphics tablet
Digital camera
OCR
MICR
Types of Interface…read more

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Menu driven
Command driven
Graphical user interface (GUI)
Operating systems
-group of programmes/programme that controls the overall
operation of a computer
Multi user/multi programming/multi tasking
Windows/Unix/DOS
Real time/batch processing/transaction processing
Advantages of G.U.I
Don't need to remember the commands" needed
Keyboard/typing often not needed
Often language free /uses icons rather than words/intuitive
Can customise
Copyright
The exclusive legal / own /belong to (publish/ perform/
film/record...…read more

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Transaction Processing ­ This is the opposite of batch
processing. Individual files are updated in response to
individual requests e.g. checking how much you owe on your
electricity or gas bill.
Data Validation
Range Check ­ checks that the data fits within a specified
range e.g. between 1 to 12
Presence Check ­ make sure that important information is
entered e.g. d.o.b
Digit Check ­ checks that numerical data is entered correctly.
Data Type ­ checks that text hasn't been put where numbers
are needed.…read more

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Local Area Network used Software can be shared amongst
in most offices and different users.
schools Communication across the network is
cheap and fast.
Disadvantages
Cabling can be expensive to install and
replace.
A fault with the server prevents the
whole system working.
Security needed to restrict access to
network or parts of it.
WAN's are vulnerable to hackers or
viruses.
WAN Wide Area Network used
to connect computers
from various sites.…read more

Comments

Qwerty

USELESS!!!!!!!!!!!!!!

misleading comment - says its for aqa , but general notes

RUBBISH

DO NOT RECOMMEND

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