- 1) In information technology, a product or system is described as open when its workings are exposed to the public and capable of being modified or improved by anyone. The alternative is a proprietary product or system. Also see open source.
2) In programming, to open (verb) a file or unit of data is to make it accessible for reading and writing. An open file is one that is ready to be read or written to.
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30 Jul 2001
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