For one thing, it is a real UNIX in terms of lineage and not a clone.<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=ds77e3aO9nA" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=ds77e3aO9nA</a><p><a href="http:&#x2F;&#x2F;www.informit.com&#x2F;store&#x2F;design-and-implementation-of-the-freebsd-operating-9780321968975" rel="nofollow">http:&#x2F;&#x2F;www.informit.com&#x2F;store&#x2F;design-and-implementation-of-t...</a>