ORBL
(redirected from Open Relay Black List)| Acronym | Definition |
|---|---|
| ORBL | Open Relay Black List |
| ORBL | Outlined Raised Black Letters (Automotive tire) |
| ORBL | Orange Balls of Light (unidentified flying objects) |
| ORBL | Operational Requirements Baseline |
| ORBL | Online Resource-Based Learning |
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