Windows NT 4.0 architecture Windows NT 4.0 Win16 Architecture MS-DOS NTVDM Win32 subsystem POSIX Console 082 Security subsystem subsystem subsystem Misc.ervironment functions User MMode Kernel MMode Executive Services SystemServices lO Manager Window Cache Manager Object Security Local Virtual Manager Process Procedurel File System Manager Reference Memory Monitor Manager Call Manager Graphics Drivers Facilty Devicelnterface Network (IN32KSYS) Drivers hology of China Microkernel Graphics Hardware Device Device Drivers Hardware Abstraction Layer (HAL) Drivers 嵌入式系统实验室 Hardware 5/90 EMBEDDED SYSTEM LABORATORY SUZHOU INSTITUTE FON ADVANCED STUDY OF USTC5/90 Windows NT 4.0 architecture