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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…

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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…

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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…

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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.../ goal seeker
Process cyclic/repeated

Health Risks

RSI
Eye strain
Back strain
Bad posture
Migraines
Circulation problems
Back/neck pain/problems
Possible radiation…

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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…

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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…

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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

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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…

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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…

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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…

Comments

Qwerty

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

misleading comment - says its for aqa , but general notes

RUBBISH

DO NOT RECOMMEND

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