Question

what is closed source software

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Answer 1

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Proprietary software, also known as closed-source software, is non-free computer software for which the software's publisher or another person retains intellectual property rights—usually copyright of the source code, but sometimes patent rights. ..

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Answer 2

Answer:

Closed source software is any software that is not distributed in the public domain. Most often, closed source software will be compiled and encrypted in a proprietary format and distributed as commercial software.