AQA ICT INFO 2 - LIVING IN THE DIGITAL WORLD

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1 ICT SYSTEMS AND THEIR COMPONENTS

1.1 WHAT IS ICT?
Information Communication Technology is the use of technology for the input,
processing, storage, and transfer of data and the output of information; for example,
traditional computers doing tasks such as sales processing by entering sales data to
produce output information…

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1.6 WHAT ARE THE COMPONENTS OF AN ICT SYSTEM?
The following are the components of an ICT system

1. People
They are involved at every stage of a development, with no ICT system able to function
with the input of human interaction. Large organisations split work up between
departments. These…

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2 DATA AND INFORMATION

2.1 WHAT IS DATA?
Data represents raw facts and figures or a set of values. A set of data might consist of
2, 4, 3, 5, and 6. Another familiar set might be data collected from examination results,
such as 23, 45, 67, 98 and 78.…

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Disadvantage of Coding Data
When data is coded it loses some of its accuracy and it can be difficult to remember the
codes.

Encoding
Encoding is used by computers to convert data into machine readable form. All
computers understand is binary, 1s and 0s, therefore in order for people to…

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habits, and the supermarket can use that information when deciding what special offers
to tempt you to spend more at the store.




2.7 QUALITY OF INFORMATION


What makes information valuable?

1. Accuracy ­ Decisions, often important ones, are made when certain information
is considered, so inaccurate information will mean key…

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3 PEOPLE AND ICT SYSTEMS

3.1 ICT SYSTEMS: DESIGN AND PURPOSE
The systems that are used by organisations have been designed to be used by people and
commissioned for a particular purpose. It is important to appreciate that different users
have different needs. The client, end user and audience may…

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operatives better with orders. A graphic artist with a graphics tablet to better mimic
movements of drawing aids.


5. Age - Older users react more slowly to younger ones, and so the ability to adjust the
speed of cursor movement and the rate at which they to double click an…

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system. It does not make a heavy demand on system resources or memory. They
can be quicker than graphical interfaces for expert users.


Positives and negatives of user interfaces

Positive Negative

GUI Easy to use and intuitive Needs a lot of memory
Use graphics to show Needs more disk space…

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IT Project Manager: IT project managers oversee the development of computer
systems to meet a client's business needs, making sure that projects are
completed on time and within budget.
Computer Game Developer: Produce games for PCs, games consoles, the
internet and mobile phones.
IT Security Coordinator: Plan and carry out…

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Teamwork ­ few ICT projects are completed by a single individual and so
teamwork skills are vital.

Characteristics of an Effective Team:
The team leader must ensure that the team members work together in an
organised ad effective manner to ensure deadlines are met.
An appropriate structure must be in…

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