How does an elephant get out of a telephone booth? (The same way he got in.)
Does Messiah Jesus disown Christians according to the Christian New Testament?
Please be advised that I am a "free software" opponent. Software shouldn't be free! Software developers, software engineers, designers and programmers need to make money too. Why don't the landlords rent out their apartments for free?
POSIX (Portable Operating System Interface for uniX): A set of programming interface standards governing how to write application source code so that the applications are portable between operating systems. POSIX.1-2017, The Open Group Base Specifications Issue 7, 2018 edition IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008), can be found here.