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ICT Systems and Its Compnonents

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Rebecca Chalk

on 25 October 2012

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Transcript of ICT Systems and Its Compnonents

ICT Systems An ICT system has 6 components:
Information Components The hardware is all the physical components of the system.
Hardware is used to run the software used by people. Hardware ICT systems are used by people for people.
They specify what is required and use the information output.
People create, collect and input the data in some cases.
People are involved in developing the software and hardware that makes up a system.
People are also involved in testing and interacting with it. People Data is in inputted into an ICT system usually by people.
It is processed by the system into a more useful form.
The output is information which is useful to the user or a recipient and can be used in a context. Input, Process, Output Calculations an methods carried out in the collection and input of data.
Controls the organisation, manipulation and distribution of the output information.
Procedures are specified and used by the people involved in the ICT system. Procedure The programmes used and run on the hardware that gives the system instructions of what to do.
Where information can be stored, retrieved and altered. Software Example: Keyboard, monitor and mouse. 3 Types of Software:
-System Data Raw facts and figures that are inputted into an ICT system.
Stand alone figures.
Can be collected from various sources such as a questionnaire. Example: 17 Information Information is processed data.
The output from an ICT system that can be used and applied to various tasks Example: John is 17 years old. Example: Input - bank card is inserted into a cash machine
process - the system that finds your bank account details output - the cash coming out. IPO Diagram A visual presentation of a process or activity. There are 5 main characteristics that need to be considered:
-Task being undertaken
-Environment of use
-Physical characteristics User Characteristics A young child will require a different layout to a 40 year old person working in an office and a person over 70 as they have different needs.

Example: Primary school ICT system will be very simple and a lot of visual aspects as the children may not be able to read very well. Age Different levels of experience will affect how an ICT system will be designed to suit the user.
Example: People who use a system regularly, may want shortcuts and be frustrated by unnecessary operations Experience Many ICT systems are used by people sat at a desk but not all
The system could be in a public place for instance an ATM and on the move such as a phone.
Environment of Use People who may not be able to use an ICT system in the generic way mnay require different aspects to be changed.
Example: the visually impaired may need an on screen keyboard as it allows them to type more easily. Physical Characteristics Task Being Undertaken Different tasks will require the system to do different things adnd may need different hardware and software.
Example: A specific peripheral device for gaming.
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