Narcissism is a factor in trait theory used in various self-report inventories of personality such as the Millon Clinical Multiaxial Inventory. It is one of the three dark triadic personality traits (the others being psychopathy and Machiavellianism). Except in the sense of primary narcissism or healthy self-love, narcissism is usually considered a problem in a person's or group's relationships with self and others. Narcissism is not the same as egocentrism. The term "narcissism" comes from the Greek myth about Narcissus (, ""), a handsome Greek youth who, according to Ovid, rejected the desperate advances of the nymph Echo. This caused Narcissus
Greek mythology in popular culture to name its equipment such as the Nike missile project and the Navy having over a dozen ships named from Greek mythology. Greek mythology has been the source for names for a number of ships in the British navy as well as the Australian Royal Navy which has also named a training facility in Victoria called HMAS Cerebus. The Canadair CP-107 Argus of the Royal Canadian Air Force is named in honor of both the hundred eyed Argus Panoptes the "all seeing" and Odysseus' dog Argus who was the only one who identified Odysseus upon his return home. Many celestial