All software is written. Hardware is the bits of your computer which are fixed, such as the keyboard, monitor, and so on. Software refers to the programs that are written to instruct it all how to work.
Pre written software is that type of software which is developed on the basis of generic concept where as user written/custom application software is developed based on the requirement of the particular business, organization or user requirements.
Two advantages of custom written software are that the software is specific for the needs of the consumer, and the consumer owns the software after it is written for them. Two disadvantages are that this software often needs debugged, which can take hours, and the consumer does not get the credit for writing the software.
Custon Written software is a software which is written for one specific occasion. It mat be that a researcher needs to do a lot of complex calculations.
Chris Sterling has written: 'Managing software debt' -- subject(s): Software reengineering, Agile software development, Quality control, Computer software
Jim McCarthy has written: 'Dynamics of software development' -- subject(s): Development, Computer software, Ontwikkeling (proces), Software
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Ian. Sommerville has written: 'Software engineering' -- subject(s): Software engineering
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Ernst Denert has written: 'Software-Engineering' -- subject(s): Software engineering
K. A. Saleh has written: 'Software engineering' -- subject- s -: Software engineering
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