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What is open source software
software where the source code is made freely available so users may legally modify the source code
what are the advantages of open source software
It is usually free
Software can be adapted by users to fit their needs
Popular software is very reliable and secure - any problems are quickly solved by the community
A wide pool of collaborators can be more creative and innovative than the programmers of one company
What are the disadvantages of open source software
No warranties if something goes wrong
No customer support
There may be limited user documentation
Small projects may not get regular updates and so could be buggy or have unpatched security holes
What is proprietary software
Software where modifying and sharing is not permitted and only compiled software is released
what are the advantages of proprietary software
comes with warranties, documentation and customer support
should be well-tested and reliable as the companies reputation depends on this
Fixes and updates will come regularly
Usually cheaper for companies than developing their own custom-built software
what are the disadvantages of proprietary sofware
can be expensive
software may not exactly fit a users need and they cant do anything about it
software companies may not maintain older software after warranties expire so people may need to buy the latest product