Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym PWIS is...

PWIS is

  • Prisoner of War Information System

PWIS is also in:

Acronym Definition Searched: ATIS UWN MH 86442 WQA WPSF SAPG GGSN PL/1 AN CR5 URSI CEB-KU VWG 56510