MacOSX 10.5 Leopard has authorized as a kind of UNIX on 11/19/2007 by The Open Group. It is useful and fan to learn CUI environment by Leopard; which guides us to as an intermediate grade of user. It is also a way to take the initiative in using computer not to be used by it. Reference: http://www.scribd.com/doc/ MacOSX Terminal Command (Pocket Reference), 2006 MacOSX 10.5 Leopardは2007/11/14に公認