### - a -

- AboutWidgets : misc_widget.h
- AccelerationModel : vehicle_type.h
- AccelStatus : ground_vehicle.hpp
- Action5BlockType : newgrf.cpp
- AdminCompanyRemoveReason : tcp_admin.h
- AdminStatus : tcp_admin.h
- AdminUpdateFrequency : tcp_admin.h
- AdminUpdateType : tcp_admin.h
- AIConfigWidgets : ai_widget.h
- AIConstructionEvent : newgrf_generic.h
- AIDebugWidgets : ai_widget.h
- AIListWidgets : ai_widget.h
- AircraftSpeedLimits : aircraft_cmd.cpp
- AircraftSubType : aircraft.h
- AircraftSubTypeBits : engine_type.h
- AirpAnimationTrigger : newgrf_animation_type.h
- AirportClassID : newgrf_airport.h
- AirportMovementStates : airport.h
- AirportMovingDataFlags : airport.h
- AirportPickerWidgets : airport_widget.h
- AirportTileCallbackMask : newgrf_callbacks.h
- AirportToolbarWidgets : airport_widget.h
- AirportTypes : airport.h
- AISettingsWidgets : ai_widget.h
- ArrowWidgetValues : widget_type.h
- Axis : direction_type.h
- AyStarNodeUserDataType : npf.cpp
- AystarStatus : aystar.h
- AyStarUserDataType : npf.cpp