Open source makes up to 90% of modern software stacks via frameworks, libraries, databases, operating systems, and applications. There are two broad kinds of licenses: ""Permissive"" licenses, like MIT, allow modification and distribution with few restrictions, and ""copyleft"" licenses, which require modified versions to be distributed under the same license. The MIT license is simple but lacks explicit patent rights.
Open source makes up to 90% of modern software stacks via frameworks, libraries, databases, operating systems, and applications. There are two broad kinds of licenses: ""Permissive"" licenses, like MIT, allow modification and distribution with few restrictions, and ""copyleft"" licenses, which require modified versions to be distributed under the same license. The MIT license is simple but lacks explicit patent rights.