Pras

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Pras means:

Pras (Phthiotis) , an ancient city in the Phthiotis in Thessaly
Samuel Prakazrel "Pras" Michel (* 1972), American rapper and songwriter

PRAS is abbreviation for:

Polynomial-time Randomized Approximation Scheme , a variant of the Polynomial-time Approximation Scheme (PTAS), a method for finding approximate solutions for optimization problems