Source Code for SunOS 4.1.3 (1992)
So where did this come from? The readme says,<p>> This is the SunOS 4.1.3 SUNSRC CD-ROM<p>which almost sounds like it was an officially distributed archive, somehow? I mean, I can't <i>personally</i> think of any reason for Sun to make a CD distribution of SunOS (was it called the OS/net gate yet?) for purely internal use, although maybe I'm just missing perspective, but the <a href="https://github.com/Arquivotheca/SunOS-4.1.3/blob/413/Copyright" rel="nofollow">https://github.com/Arquivotheca/SunOS-4.1.3/blob/413/Copyrig...</a> <i>looks</i> to my very-non-lawyer eyes like all-rights-reserved and 4.1.3 was well before opensolaris, so... leak of some kind?<p>Edit: Looking at the copyright file again, it has a part number. Did Sun license sunos? That certainly <i>feels</i> like it was meant for use outside of Sun, but doesn't really explain why/how