資料來源 : WordNet®

Pr
     n 1: a soft yellowish-white trivalent metallic element of the
          rare earth group; can be recovered from bastnasite or
          monazite by an ion-exchange process [syn: {praseodymium},
           {atomic number 59}]
     2: a self-governing commonwealth associated with the United
        States occupying the island of Puerto Rico [syn: {Puerto
        Rico}, {Porto Rico}, {Commonwealth of Puerto Rico}]
     3: a promotion intended to create goodwill for a person or
        institution [syn: {public relations}]

資料來源 : Free On-Line Dictionary of Computing

PR
     
        {Packet Radio}

pr
     
         The {country code} for Puerto Rico.
     
        (1999-01-27)