Windows NT Executive

User Mode

Kernel Mode

Windows NT User-Mode Components

Hardware

System Services (NT Native API)

Win32

Kernel

mode

components

User

GDI

Spooler

Object

Mana-

ger

Security

Reference

Monitor

Process

Manager

Local

Proc.

Call

(LPC)

Virtual

Memory

Manager

(VMM)

IO Manager

Cache Manager

File Systems

Drivers

Kernel

Hardware Abstraction Layer (HAL)

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