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software
subject			fact

software	can be easily duplicated
	can have usability without utility^2
	can have utility without usability
	has definition Programs and related data that run on a computer
	deteriorates as it is changed repeatedly
	does not wear out with use like other engineering artefacts
	has quality which is only as good as its lowest-quality reusable component
	is hard to change correctly
	is intangible
	is more reliable if it has fewer failures
	is a subtopic of 1.1 - The Nature of Software
	is designed usually for human beings to use
	is a kind of subject
	must be designed with users' input otherwise it may not be usable
	often has a poor design and is steadily becoming worse

Kinds of software :

• bad software (1 kind, 6 facts)
• custom software (14 facts) - Software developed to meet the needs of a particular customer, Software that is developed to meet the specific needs of a particular customer (in contrast to generic software)
• data processing software (8 facts) - Software used for running businesses, managing data such as payroll, purchases, sales, product inventory etc.
• embedded software (11 facts) - Software that is designed to run specific hardware devices, and thus is embedded in the devices, usually in a form of read-only memory (ROM)
• generic software (19 facts) (commercial off-the-shelf software, shrink-wrapped software) - Software designed to be sold on the open market and to perform functions on general-purpose computers that many people need (in contrast to custom software)
• good software (3 facts)
• modified software (3 facts)
• real-time software (7 facts) - Software that must react immediately to stimuli from the environment