### - a -

- AboutWidgets : misc_gui.cpp
- 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
- AIConfigFlags : ai_info.hpp
- AIConfigWindowWidgets : ai_gui.cpp
- AIConstructionEvent : newgrf_generic.h
- AIDebugWindowWidgets : ai_gui.cpp
- AIListWindowWidgets : ai_gui.cpp
- 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_gui.cpp
- AirportTileCallbackMask : newgrf_callbacks.h
- AirportToolbarWidgets : airport_gui.cpp
- AirportTypes : airport.h
- AISettingsWindowWidgest : ai_gui.cpp
- ArrowWidgetValues : widget_type.h
- Axis : direction_type.h
- AyStarNodeUserDataType : npf.cpp
- AystarStatus : aystar.h
- AyStarUserDataType : npf.cpp