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| Question | Answer |
| what is open source ? | open source software is software whose source code is available for modification or enhancement by anyone. |
| what is proprietary ? | propriety software is software that is owned by a individual or a company and is not available to edit |
| what is off the shelf? | is software that is ready straight away a example of this is word, spread sheet and email software. |
| what does custom written mean? | custom written is a specially produced software for a individual. takes a long time to develop. |
| advantages of open source | it is free easily improved code can be modified its reliable |
| disadvantages of open source | not reliable easily hacked could be bad quality no support if problem |
| advantages of propriety | it can be altered it is free very reliable and efficient people can work to improve it |
| disadvantages of propriety | updates may not happen or come at irregular intervals. could be bad quality |
| advantages of the shelf | it is ready straight away it should been extensively |
| disadvantages of |
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