Fields

UNKNOWN = 0,

An unknown subsystem

NATIVE = 1,

Device drivers and native Windows processes

WINDOWS_GUI = 2,

The Windows graphical user interface (GUI) subsystem

WINDOWS_CUI = 3,

The Windows character subsystem

OS2_CUI = 5,

The OS/2 character subsystem

POSIX_CUI = 7,

The Posix character subsystem

NATIVE_WINDOWS = 8,

Native Win9x driver

WINDOWS_CE_GUI = 9,

Windows CE

EFI_APPLICATION = 10,

An Extensible Firmware Interface (EFI) application

EFI_BOOT_SERVICE_DRIVER = 11,

An EFI driver with boot services

EFI_RUNTIME_DRIVER = 12,

An EFI driver with run-time services

EFI_ROM = 13,

An EFI ROM image

XBOX = 14,

XBOX

WINDOWS_BOOT_APPLICATION = 16,

Windows boot application