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Hades (from Greek , Hadēs, originally , Haidēs or , Aidēs, probably from Indo-European * 'unseen') refers to both the ancient Greek underworld and the god of the dead. The word originally (as in Homer) referred to just the god; , Haidou its genitive, was an elision of "the house of Hades". Eventually, the nominative, too, came to designate the abode of the dead.
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I.A.T.A., International Air Transportation Association, international organization which monitors and regulates many aspects of the airline industry including safety standards and industry cooperation

[Etruscan] The Etruscan god of the underworld. He is identical with the Greek Hades and the Roman god Pluto.