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

OPTO is

  • One Person Train Operation

More Meanings For OPTO:

  • Optio Software
  • One Person Train Operation

OPTO is also in:

Acronym Definition Searched: AWC EF 89111 VOT INCAP TWT SAR LPO E 21798 58324 UEC TTES ACFF 60466