[MSDN Library June 1998] Optional Tag Values (34.1677710510728%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Windows 95 Device Driver Kit > Design and Implementation Guide > Image Color Matching and Printer Drivers in Windows 95 > Overview of ICC 3.0 Profile Tags Used by Windows 95

[MSDN Library June 1998] Optional Features of ACM Drivers (33.2339669738863%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Windows 95 Device Driver Kit > Design and Implementation Guide > Audio Compression Manager Drivers > About the Audio Compression Manager

[MSDN Library June 1998] Optional Implementation (29.3173124975974%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Active Directory Service Interfaces (ADSI) Version 2.0 > Guide > ADSI for Providers > Provider Minimum Requirements

[MSDN Library June 1998] Optional Methods (27.8317577030812%)

MSDN Library Visual Studio 6.0 > Platform SDK > COM and ActiveX Object Services > COM > Appendixes > ActiveX Control and Control Container Guidelines > Containers

[MSDN Library June 1998] Optional Display Driver Functions (25.3345739626227%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Microsoft Windows NT 4.0 DDK > Graphics Drivers > Design Guide > Part 2: Display and Video Miniport Drivers > Chapter 5 DDI Support in Display Drivers > Display Driver DDI Functions