Windows Server 2003 auditing event ID listings can be found in two locations:
Auditing Policy from Windows Server 2003: Security and Protection:
Chapter 4 of the Windows Server 2003 Security Guide:
Windows Server 2008 and Windows Server 2008 R2 events and errors details for general OS components can be found on Microsoft’s TechNet website
Windows Server 2008 Component-Based Servicing events
Windows 7 AppLocker Event IDs and definitions:
Distributed Management Task Force, Inc: Web Services for Management (WSManagement) Specification.
Microsoft Corporation: Credential Security Support Provider (CredSSP) Procotol.
Microsoft Corporation: Windows Error Codes.
Microsoft Corporation: Web Services Management Protocol Extensions for Windows Vista.
Microsoft Corporation: Setting up a Source Initiated Subscription.
This page contains raw error codes and is meant as a software developer reference.