What does OPERA stand for?

Here's a list of possible definitions for the shorthand OPERA:



Open Process Engine For Reliable ActivitiesSoftware
Oscillation Project with Emulsion tRacking ApparatusPhysics
Option Portfolio for Emissions Reduction AssessmentUnclassified
Office of Policy for Extramural Research AdministrationResearch
Out of Pile Expulsion and Reentry ApparatusUnclassified

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