What popular operating system are the Mac OS X series based on?

More Questions:

What is the fear of dependence on others known as?

What baseball hall-of-famer was nicknamed "Hammerin" Hank"?

What was the first brand of toothpaste to be sold in tubes rather than jars?

In what city did d'Artagnan meet The Three Musketeers in the Alexander Dumas story?

What is the Roman name of the Greek goddess Artemis?

What state was the setting for the novel "The Bridges of Madison County"?

In Greek mythology, for who did the cyclops forge thunderbolts?

Which US state is home to Clemson University?

The Golden Gate Bridge is located in what city?

Which TV show used the song "Bad Reputation" by Joan Jett as its theme song?

What 1966 Science fiction film staring Raquel Welch did Richard Fleischer direct?

What was the nickname of Morgan Freeman's character in the 1993 movie "The Shawshank Redemption"?

The movie "Reservoir Dogs" marked the directorial debut of whom?

In 1926, Admiral Richard Byrd made the first flight over which pole?

Who wrote the novels "The Joy Luck Club" and "The Kitchen God's Wife"?