### - o -

- offset : CompanyManagerFaceBitsInfo , LoggedChange
- oil_refinery_limit : GameCreationSettings
- okay : PBSTileInfo
- old_tile : GetNewVehiclePosResult
- oldval : LoggedChange
- online : NetworkGameList
- opf : PathfinderSettings
- order : GameSettings
- order_review_system : GUISettings
- orig_list : NewGRFWindow
- other_company_name : CompanyNewsInformation
- override : GRFFileProps
- owner : TileDesc , Industry , Window , CargoPayment
- owner_type : TileDesc