| Acronym | Definition |
|---|
| OLO | Ohio Light Opera |
| OLO | Online Ordering |
| OLO | Opera Lyra Ottawa (Canada) |
| OLO | Other Licensed Operator |
| OLO | Olomouc, Czech Republic (airport code) |
| OLO | Office of the Leader of the Opposition (Canadian Parliament) |
| OLO | Oeufs Lait Oranges (French: eggs, milk and oranges, a Canadian charity assisting pregnant women) |
| OLO | Orange Lutheran Online (Orange Lutheran High School, Orange, CA) |
| OLO | Other Local Operator |
| OLO | Obligations Linéaires Ordinaires (French: Linear Ordinary Bonds) |
| OLO | Only Laughed Once |
| OLO | Optical Local Oscillator |
| OLO | Ontario l'Original Railway |
| OLO | Optimal Linear Ordering |
| OLO | Old Lewesians Organisation (UK) |
| OLO | Other Learning Opportunities (El Paso, TX) |