[DirectX 5 Programmer's Reference] Software Emulation (78.5714285714286%)

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[DirectX 6 Programmer's Reference] Software Emulation (78.5714285714286%)

DirectX Foundation > DirectDraw > DirectDraw Architecture

[DirectX 3 Programmer's Reference] Software Emulation (44.8693064182195%)

DirectSound > DirectSound Architecture > Object Types

[DirectX 2 Programmer's Reference] Software Emulation (42.5776397515528%)

DirectSound > Overview > Object Types

[DirectX October 2006 Documentation] Software Shaders (27.8795721187026%)

DirectX Graphics > Direct3D 9 > Reference > Asm Shader Reference

[DirectX 5 Programmer's Reference] Software versus Hardware (25.9004688832055%)

DirectX Foundation > Direct3D Immediate Mode > Direct3D Immediate-Mode Essentials > Performance Optimization