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on order for ict hardware to operate it needs two types of software: system software and application software.

applications software is software that allows the comouter to beapplied to a particular problem

systems software is any computer that manages and controls the hardware thus allowing the application software to do a useful job. system software is a set of programs which instruct the hardware what to do .

operating systens- is to allow the application software to interact with the computer hardware.

command line driven interface - where you have to type in commands in a certain language for the computer to do something.

advantages

• quicker on some instanses it is quicker to type in a commmand lane rather than using the mouse etc

disadvantages

• very diffiuclt for users to use you have to learn the structure of commands 
• have to remember instructions it is hard to remeber the instructions/commands you need to do a particular task.

GUI'S are populare because instead of typing in commands you just have to click on them 

main features of GUI's

• windows- the screen is divded into areas called windwos this is useful if you want o do severa task at once
• icons - these are small pictures used to represent commands
• menu- allow user to make seletion from list

advantages

• no language needed
• easiers to use a mouse
• use of icons

disadvantages

• more memory is needed
• increased processing requirements

file management software is provided as part of the systems software:

• file/folder organisation - used to create folders, copy folders etc
• backup copy - used for the taking of backup foro security purposes
• file compression- used to compress files before storing or being sent over a netwirk
• defragmentation - used to tidy up the surface of magnetic hard drive so that files can be accessed and read more quickly by the operationg system.
• file recovery- used to recover deleted / damaged files
• uninstallers - software used to remove all the files put onto the computer when a piece of software was installed.

peripherals are input devices e.g printers, scanner etc

each peripheral device need a software to work with called peripheral drivers. so it needs driver software to be installed.

peripher drivers:

• provide communiocation between operating systems/applications software and the peripheral device.
• convert instructions from the software into a form the peripheral device can understand.
• enable the peropheral device to work with other applications and opertationg systems
• produce error messges

peripheral driver are installed straight away when the peripheral is plugged in or you ca  install them using a disk, or from the internet.

main health problem that may occue in ivct systems are

• back ache
• rsi
• eye strain
• stess

back ache - use adjustable chair, sit up straight, make sure screen is lined up and tilted at appropriate angle.

RSI - adjust chsir, document holder, wrist rest, learn how to type properly, use and ergnomic mouse/ keyboar

eyestrain - keep the screen clean, use appropriate lighting, regular eye test, dont sit too near to the screen.

stress - the pace of work, worrying about new technology, software that is fustriting to use because it has been designed baldy, losing work.