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Joanna Ko | 11vb

Payrolls are used to manage wages and salaries of the
There is a lot of data to put into account and may need a
few days or processing.
Workers are paid in arrears--they are paid for the week

Page 2

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Ancestral backup systems are used because they provide three levels of backup (even
four at times). The table below explains the levels:
Son New master file ­ will become the old master file when the
payroll program is run again
Father Old master file ­ stored securely but accessibly, possibly…

Page 3

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1. Decide on seat on flight
2. The flight information and booking file must be updated (on the airline's side) so that
further enquiries show the seat has already been booked
3. Those particular seats will also be locked out to avoid double booking
4. Tickets may be printed…

Page 4

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The data held on a barcode identifies the product and includes the product code and the
check digit.
When the barcode is scanned i.e. the item is purchased, the data is transmitted to the main
computer and checked against the check digit of the main computer--if it doesn't match, a…

Page 5

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Main computer may be a general computer used for a range of applications, but it
must have the sufficient capacity to handle communications from all POS terminals
and sufficient storage to record details about all products.

Ecommerce (online shopping)
Online shopping is the buying or selling or goods or a…

Page 6

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4. If the PIN is correct, the customer is asked to select a transaction from the list
displayed. If the option of a withdrawal or a transfer is selected, the computer
checks his account to see if there is a sufficient amount of money
5. If there are sufficient funds,…

Page 7

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A CAD system uses a computer hardware and software in the drawing of engineering or
architectural designs. It is designed to make it easier to produce detailed plans and accurate
technical drawings.
It contains software that provides a set of standard components and basic elements like
points, lines, circles, shapes…

Page 8

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Weather stations are simply groups of sensors that provide useful information regarding the

Weather forecasting
Weather forecasting tries to predict what weather conditions will be like by measuring and
observing the current weather and supplying the data to a supercomputer.

Robots are hardware devices that perform physical tasks,…

Page 9

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This was developed to organize the supply, movement and maintenance of an armed force
under operational conditions.
Logistics could involve the organization of:
Information (the integration and coordination of information about customers'
needs) e.g. for a supermarket ­ collected from loyalty cards/analysis of sales
Transport (the transport of a wide…

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These systems are widely used to help with the daytoday running of schools. They can be
used for various purposes: to store students' records, to produce class lists, to register
students, to produce reports, to manage book loans from the school library, to construct
the school timetable etc.



Eleonora Della

Do you have notes for the other chapters? If yes please please could you share them? I found your notes the best of all I've found up to now! Great job! :)

Miss Morgan

A comprehensive set of notes, clearly identifying key elements and highlighting strengths and weaknesses for easy revision.  










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Great Revision Source

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