Definities van Klein hotelvademecum in de Ensie O
- Ober
- Ober-kelner
- OC
- Occupancy
- Occupancy rate
- Occupant rate
- Odner Hotel Representative (OHR)
- Off season
- Off-season rate
- Offer/Offerte
- Office
- Officers' check
- On change (OC)
- Ontbijtbuffet
- OOO
- Opening hours
- Operating company
- Operation(al) controller
- Operation(al) manager
- Operator
- Option date
- Out of order (000)
- Outchecken (spreektaal)
- Outplacement
- Output
- Outs
- Outside call
- Outside room
- Over and short
- Overhead costs
- Overseas call
- Overstay
- Overtip