Application Software - Software that enables the computer to do a particular task e.g. word processing, System software is - software responsible for the general operation of a computer system, including the operation of hardware, running application software, and file management, 3 functions of system software are - allocating memory, storage and processing time, Application software are programs designed for - an end user to to do a particular task, such as word processing or spreadsheet programs, System software includes - the operating system and all utility programs that enable the computer to operate its hardware and applications software, In software, there are 3 modes of - processing, Real-time processing - occurs immediately data is input and updating occurs before the next input occurs e.g. airline/concert booking systems, Examples of real-time processing include - airline/concert booking systems, online stock control systems and air traffic control systems, In air traffic control, real-time processing is - essential to avoid a disaster, Batch processing means collecting data - over a period of time such as a day and is processed together at a later time, such as overnight, Batch processing involves no - human involvement, Applications that use batch processing include - billing systems (electric, gas and telephone), payroll systems (weekly/monthly) and banking systems (monthly customer statements), Data is input to a computer system during off peak times - during batch processing, While the computer system is processing a batch of data - it cannot be used for anything else, Multi-user system processing is when - the operating system switches between computers, giving each one a 'time slice', A multi-user system involves - many users at different computers sharing the processor of a powerful computer, A multi-user system is also know as - a time-sharing system, Applications that use multi-user systems are - multi-user database management systems,

Software EX. 1 (CCEA GCSE Digital Technology)

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