OPARS

AcronymDefinition
OPARSOptimum Path Aircraft Routing System
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References in classic literature ?
"That is what I suspect," replied Tarzan; "but whatever the cause, the fact remains that I have lost everything, and there is nothing for it but to return to Opar and get more."
I would rather live in poverty always than to have you risk the hideous dangers of Opar."
"They ran away from Opar once, and left you to your fate," she reminded him.
"There is no other way half so easy to obtain another fortune, as to go to the treasure vaults of Opar and bring it away," he replied.
"I am La, high priestess of the Temple of the Sun, in the city of Opar. We are descendants of a people who came to this savage world more than ten thousand years ago in search of gold.
She was gone, and Tarzan of the Apes was left alone in the Chamber of the Dead, beneath the long-dead city of Opar.