+Proprietary software, often called closed-source, is [software](/wiki/software) distributed under a restrictive [license](/wiki/license), limiting user rights to modify, share, or redistribute it. Its design and code are typically guarded by [copyright](/wiki/copyright), keeping the source code hidden from public view.
+## See also
+- [Free Software](/wiki/free_software)
+- [Open Source](/wiki/open_source)
+- [Software](/wiki/software)
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