One of the primary resources for experts conducting Usability Evaluation or Design Reviews is intimate knowledge and familiarity with industry standard User Interface Design Guidelines.

General User Interface Design Style Guides
 

• Apple Human Interface Guidelines (Mac OS X) Design Guidelines
  
  Apple User Experience Documentation
  
  Microsoft User Interface Guidelines (Click in the left tree on User Interface Design...)
  
  Windows XP Guidelines
  
  Yale Web Style Guide (2nd Edition)
  
  Java Look and Feel Guidelines (version 1)
  
  Java Look and Feel Guidelines version 2
  
  Java Look and Feel Guidelines: Advanced Topics
  
  IBM 3D design Guidelines
  
  Silicon Graphics Indigo Magic User Interface Guidelines
  
  Oracle Technology Network Guidelines
  
  SUN OpenStep User Interface Guidelines

Open Source Usability Guidelines
 

• Motif Style Guide
  
  KDE User Interface Guidelines
  
  Gnome Human Interface Guidelines 1.0
  
  Gnome Human Interface Guidelines 2.0

Corporate User Interface Standards and Guidelines (samples)
 

• Telstra Online Standards
  
  Taligent Human Interface Guidelines
  
  Ameritech Graphical User Interface Standards and Design Guidelines

Government funded Usability Guidelines (American)
 

• MITRE Guidelines for Designing User Interface Software (US Airforce)
  
  Research based Web Design and Usability Guidelines (Dept. of Health and Human Services)
  
  Cancer Institute evidence-based guidelines on web design and usability issues
  
  NASA User Interface Guidelines
  
  Canadian Command Decision Aiding Technology (COMDAT) Operator-Machine Interface (OMI) Style Guide: Version 1.0

Gaming Devices (J2ME games)
 

• Games Usability Guidelines from Nokia

Wireless and Mobile Usability Guidelines
 

• Palm OS Design Guidelines
  
  Blackberry and RIM wireless handheld UI Developers Guide (PDF)
  
  NTT DoCoMo imode service guideline (user interfaces
  
  Generic user interface elements for mobile terminals and services

Web style guides
 

• AT&T web style guides
  
  GE Interactive Toolkit Version 1.0
  
  IBM Ease of Use Web design guidelines
  
  SAP Design Guild
  
  SAP Interaction Design Guide for Internet Application Components
  
  Apple Web Design Guide
  
  Carnegie Mellon Web Publishing Style Guide
  
  The Library of Congress World Wide Web Style Guide
  
  Florida State University web style guide

Other Platforms
 

• IRIX庐 Interactive Desktop User Interface Guidelines
  
  IBM iSeries Navigator Software Interface Guidelines

Accessibility Guidelines
 

• Techniques for Web content Accessibility Guidelines 1.0