Today, the Mac OS 10 turns 10.
Called Mac OS X, and codenamed by various cool wild cats, Apple's operating system launched as Cheetah on March 24, 2001. It was quickly followed up by Puma, or 10.1, which addressed the many glitches of the original Mac OS X.
Other cats have came into play, including Tiger, Leopard, and most recently Snow Leopard. This summer, Apple plans to launch Lion, which will be 10.7.
Since the OS X launched, it has succeeded - but what has succeeded even more has been its other OS, iOS, for mobile devices. Its iPod, iPhone, and iPad have all been "post-PC" blockbuster products in the past 10 years (although iOS didn't technically exist until the iPhone came into play in 2007).
Happy Birthday, OS X! And don't get too jealous of your baby brother.