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Transcript of ICT Systems
•Systems software: the files that make up a computers operating system. Controls how the ICT system’s hardware components work together, software to protect from an outside attack. It is called ‘low-level’ software. Example: windows, Apple Mac OS X, fire walls.
•Communications software: is used to provide remote access to systems and exchange files and messages in text, audio and video formats between computers.
•Applications software: designed to help the user to perform specific tasks such as accounting software of stock control. Can include general packages for text, number, image and sound manipulation. What are the components of an ICT System? Hardware Hardware is the physical components that make up the computer system that the ICT system is based upon. It consists of processors that perform the manipulations and obey control instructions from the software, storage devices and input and output peripherals, including communication devices and communication media. What are the components of an ICT System? Information Information is the output from an ICT system. This can take many forms and formats and will be distributed to various recipients using a variety of methods. Information distributed to a human recipient from an ICT system can be visual or aural. Characteristics of an ICT user Different users of ICT systems have differing requirements which depends on a number of factors:
-environment of use
-task to be undertaken Age Age is an important characteristic when thinking about an ICT user, for example, an ICT system in a primary school will need screen designs to be very simple with visual clues as children may not be able to read very well.
A concept keyboard with pictures overlaid on a pressure-sensitive pad may be more suitable than a standard keyboard. Experience -people who would want to use shortcuts and can be frustrated if slowed down by unnecessary operations.
-users who infrequently use the ICT system will need clear instructions and choices.
-or users who rarely use any ICT systems will need very simple instructions with many visual clues.
Physical Characteristics -poor eyesight
-unable to use a standard keyboard
Ways of making ICT usable:
-specialist pointing devices
Environment of use Many ICT systems are used by people sitting at a desk, but not all of them; access to an ICT system might be in a public place – using an ATM to gain information about current bank balance.
Some ICT systems can also be accessed on the move, for example, mobiles, BT hotspots.
Task to be undertaken -entering large volumes of text
-interacting with graphics
-choosing from a fixed set of options
-a specific peripheral device for gaming