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AQA AS ICT INFO2
Revision Guide (2008/10)
Living in the Digital World
DAVID J ASTALL




[email protected]
POD 2845
www.zigzageducation.co.uk




Photocopiable/digital resources may only be copied by the purchasing institution on a single site and for their own use

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Contents
Introduction.......................................................................................................................................................................3
Revision Checklist .............................................................................................................................................................3
2.1 ­ An ICT system and its components ........................................................................................................................3
What is ICT? .................................................................................................................................................................3
What is a system? ..........................................................................................................................................................3
What is a system life cycle? ..........................................................................................................................................3
What is the difference between a system and an ICT system? ......................................................................................3
What is an ICT system composed of? ...........................................................................................................................3…

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Introduction
In this resource the main elements of each unit, according to the AQA AS Level ICT specification (2008) INFO1,
are incorporated and divided into sections. The sections are numbered 2.1-2.9, but should you require them, the
full AQA unit references from the specifications can be found listed on the…

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Revision Checklist
AQA Unit Revised Topic

3.2.1 An ICT system and its components
3.2.2 Data and Information
3.2.3 People and ICT systems
3.2.4 Transfer of data in ICT systems
3.2.5 Safety and Security of ICT systems
3.2.6 Backup and recovery
3.2.7 What ICT can provide
3.2.8 Factors affecting the use…

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2.1 ­ An ICT system and its components
This section looks at what ICT is; the difference between a system and an ICT system and finally looks at the
components of ICT system.


What is ICT?
ICT is the use of technology for the input of data, storage, processing to…

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2.2 ­ Data and Information
This section distinguishes the difference between Data and Information. The main purpose of using ICT is to
process data as efficiently as possible to produce useful information.


What is Data?
Raw facts, figures, events or transactions; these are only meaningful when put into context (e.g.…

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What is Information?
Data that has been processed into a form that is meaningful and useful. Information is required in the day-to-day
running of a business and to support decision-making. Information has context and its meaning is determined by
that context (e.g. when 5, 12, 19 ­ a doctor's patients'…

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2.3 ­ People and ICT systems
This section of specification looks at the reasons why ICT systems are commissioned; it also looks at the
requirements and characteristics of users. The section looks at how humans interact with computers and what
makes a good HCI. Finally this section looks at the…

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Designing a new interface
You need to consider the following:
1. Who will use the system? An IT professional or a novice user?
2. What age is the user? A child or an adult?
3. What task does the user wish to achieve?
4. Is the task repetitive?
5. Does…

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Different types of Interface
Command Line Interface
Typing in known commands to activate a program e.g. DIR for directory search in MS-DOS. This requires the
user to be an expert in the use of programming, as each command must not only be learnt but also understood.
Incorrectly entered commands could…

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