| CAIAccounting | Class that keeps track of the costs, so you can request how much a block of commands did cost in total |
| CAIAirport | Class that handles all airport related functions |
| CAIBase | Class that handles some basic functions |
| CAIBaseStation | Base class for stations and waypoints |
| CAIBridge | Class that handles all bridge related functions |
| CAIBridgeList | Create a list of bridges types |
| CAIBridgeList_Length | Create a list of bridges types that can be built on a specific length |
| CAICargo | Class that handles all cargo related functions |
| CAICargoList | Creates a list of cargoes that can be produced in the current game |
| CAICargoList_IndustryAccepting | Creates a list of cargoes that the given industry accepts |
| CAICargoList_IndustryProducing | Creates a list of cargoes that the given industry can produce |
| CAICargoList_StationAccepting | Creates a list of cargoes that the given station accepts |
| CAICompany | Class that handles all company related functions |
| CAIController | The Controller, the class each AI should extend |
| CAIDate | Class that handles all date related (calculation) functions |
| CAIDepotList | Creates a list of the locations of the depots (and hangars) of which you are the owner |
| CAIEngine | Class that handles all engine related functions |
| CAIEngineList | Create a list of engines based on a vehicle type |
| CAIError | Class that handles all error related functions |
| CAIEvent | Class that handles all event related functions |
| CAIEventAircraftDestTooFar | Event AircraftDestTooFar, indicating the next destination of an aircraft is too far away |
| CAIEventCompanyAskMerger | Event Company Ask Merger, indicating a company can be bought (cheaply) by you |
| CAIEventCompanyBankrupt | Event Company Bankrupt, indicating a company has gone bankrupt |
| CAIEventCompanyInTrouble | Event Company In Trouble, indicating a company is in trouble and might go bankrupt soon |
| CAIEventCompanyMerger | Event Company Merger, indicating a company has been bought by another company |
| CAIEventCompanyNew | Event Company New, indicating a new company has been created |
| CAIEventCompanyTown | Base class for events involving a town and a company |
| CAIEventController | Class that handles all event related functions |
| CAIEventDisasterZeppelinerCleared | Event Disaster Zeppeliner Cleared, indicating a previously crashed zeppeliner has been removed, and the airport is operating again |
| CAIEventDisasterZeppelinerCrashed | Event Disaster Zeppeliner Crashed, indicating a zeppeliner has crashed on an airport and is blocking the runway |
| CAIEventEngineAvailable | Event Engine Available, indicating a new engine is available |
| CAIEventEnginePreview | Event Engine Preview, indicating a manufacturer offer you to test a new engine |
| CAIEventExclusiveTransportRights | Event Exclusive Transport Rights, indicating that company bought exclusive transport rights in a town |
| CAIEventIndustryClose | Event Industry Close, indicating an industry is going to be closed |
| CAIEventIndustryOpen | Event Industry Open, indicating a new industry has been created |
| CAIEventRoadReconstruction | Event Road Reconstruction, indicating that company triggered road reconstructions in a town |
| CAIEventStationFirstVehicle | Event Station First Vehicle, indicating a station has been visited by a vehicle for the first time |
| CAIEventSubsidyAwarded | Event Subsidy Awarded, indicating a subsidy is awarded to some company |
| CAIEventSubsidyExpired | Event Subsidy Expired, indicating a route that was once subsidized no longer is |
| CAIEventSubsidyOffer | Event Subsidy Offered, indicating someone offered a subsidy |
| CAIEventSubsidyOfferExpired | Event Subsidy Offer Expired, indicating a subsidy will no longer be awarded |
| CAIEventTownFounded | Event Town Founded, indicating a new town has been created |
| CAIEventVehicleAutoReplaced | Event VehicleAutoReplaced, indicating a vehicle has been auto replaced |
| CAIEventVehicleCrashed | Event Vehicle Crash, indicating a vehicle of yours is crashed |
| CAIEventVehicleLost | Event Vehicle Lost, indicating a vehicle can't find its way to its destination |
| CAIEventVehicleUnprofitable | Event Vehicle Unprofitable, indicating a vehicle lost money last year |
| CAIEventVehicleWaitingInDepot | Event VehicleWaitingInDepot, indicating a vehicle has arrived a depot and is now waiting there |
| CAIExecMode | Class to switch current mode to Execute Mode |
| CAIGameSettings | Class that handles all game settings related functions |
| CAIGroup | Class that handles all group related functions |
| CAIGroupList | Creates a list of groups of which you are the owner |
| CAIIndustry | Class that handles all industry related functions |
| CAIIndustryList | Creates a list of industries that are currently on the map |
| CAIIndustryList_CargoAccepting | Creates a list of industries that accepts a given cargo |
| CAIIndustryList_CargoProducing | Creates a list of industries that can produce a given cargo |
| CAIIndustryType | Class that handles all industry-type related functions |
| CAIIndustryTypeList | Creates a list of valid industry types |
| CAIInfo | 'Abstract' class of the AIs use to register themselves |
| CAIInfrastructure | Class that handles all company infrastructure related functions |
| CAIList | Class that creates a list which can keep item/value pairs, which you can walk |
| CAILog | Class that handles all log related functions |
| CAIMap | Class that handles all map related functions |
| CAIMarine | Class that handles all marine related functions |
| CAINewGRF | Class that handles all NewGRF related functions |
| CAINewGRFList | Create a list of loaded NewGRFs |
| CAIObjectType | Class that handles all object-type related functions |
| CAIObjectTypeList | Creates a list of valid object types |
| CAIOrder | Class that handles all order related functions |
| CAIPriorityQueue | Class that creates a queue which keeps its items ordered by an item priority |
| CAIRail | Class that handles all rail related functions |
| CAIRailTypeList | Creates a list of all available railtypes |
| CAIRoad | Class that handles all road related functions |
| CAIRoadTypeList | Creates a list of all available roadtypes |
| CAISign | Class that handles all sign related functions |
| CAISignList | Create a list of signs your company has created |
| CAIStation | Class that handles all station related functions |
| CAIStationList | Creates a list of stations of which you are the owner |
| CAIStationList_Cargo | Creates a list of stations associated with cargo at a station |
| CAIStationList_CargoPlanned | Creates a list of stations associated with cargo planned to pass a station |
| CAIStationList_CargoPlannedByFrom | Creates a list of origin stations of cargo planned to pass a station, with the monthly amounts of cargo planned for each of those origin stations as values |
| CAIStationList_CargoPlannedByVia | Creates a list of next hops of cargo planned to pass a station, with the monthly amounts of cargo planned for each of those next hops as values |
| CAIStationList_CargoPlannedFromByVia | Creates a list of next hops of cargo planned to pass a station and originating from another station, with the monthly amounts of cargo planned for each of those next hops as values |
| CAIStationList_CargoPlannedViaByFrom | Creates a list of origin stations of cargo planned to pass a station going via another station, with the monthly amounts of cargo planned for each of those origin stations as values |
| CAIStationList_CargoWaiting | Creates a list of stations associated with cargo waiting at a station |
| CAIStationList_CargoWaitingByFrom | Creates a list of origin stations of waiting cargo at a station, with the amounts of cargo waiting from each of those origin stations as values |
| CAIStationList_CargoWaitingByVia | Creates a list of next hops of waiting cargo at a station, with the amounts of cargo waiting for each of those next hops as values |
| CAIStationList_CargoWaitingFromByVia | Creates a list of next hops of waiting cargo from a specific station at another station, with the amounts of cargo waiting for each of those next hops as values |
| CAIStationList_CargoWaitingViaByFrom | Creates a list of origin stations of cargo waiting at a station for a transfer via another station, with the amounts of cargo waiting from each of those origin stations as values |
| CAIStationList_Vehicle | Creates a list of stations which the vehicle has in its orders |
| CAISubsidy | Class that handles all subsidy related functions |
| CAISubsidyList | Creates a list of all current subsidies |
| CAITestMode | Class to switch current mode to Test Mode |
| CAITile | Class that handles all tile related functions |
| CAITileList | Creates an empty list, in which you can add tiles |
| CAITileList_IndustryAccepting | Creates a list of tiles that will accept cargo for the given industry |
| CAITileList_IndustryProducing | Creates a list of tiles which the industry checks to see if a station is there to receive cargo produced by this industry |
| CAITileList_StationCoverage | Creates a list of tiles in the catchment area of the StationID |
| CAITileList_StationType | Creates a list of tiles which have the requested StationType of the StationID |
| CAITown | Class that handles all town related functions |
| CAITownEffectList | Creates a list of all TownEffects known in the game |
| CAITownList | Creates a list of towns that are currently on the map |
| CAITunnel | Class that handles all tunnel related functions |
| CAIVehicle | Class that handles all vehicle related functions |
| CAIVehicleList | Creates a list of vehicles of which you are the owner |
| CAIVehicleList_DefaultGroup | Creates a list of vehicles that are in the default group |
| CAIVehicleList_Depot | Creates a list of vehicles that have orders to a given depot |
| CAIVehicleList_Group | Creates a list of vehicles that are in a group |
| CAIVehicleList_SharedOrders | Creates a list of vehicles that share orders |
| CAIVehicleList_Station | Creates a list of vehicles that have orders to a given station |
| CAIWaypoint | Class that handles all waypoint related functions |
| CAIWaypointList | Creates a list of waypoints of which you are the owner |
| CAIWaypointList_Vehicle | Creates a list of waypoints which the vehicle has in its orders |
