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

OPSB is

  • Orbiter Processing Support Building

OPSB is also in:

Acronym Definition Searched: PABSS VBM KYSA HH PR MB ADCOM 60957 VCF LCCE GHTF LT 78278 JBC UUJ