[MSDN Library June 1998] Four Bits-Per-Pixel Format (19.7727272727273%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Windows CE Device Driver Kit > Installable Device Drivers > Windows CE Display Drivers > Display Buffer Formats

[MSDN Library June 1998] Four Character Codes (FOURCC) (11.8055555555556%)

MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > DirectX 5 > DirectX Foundation > DirectDraw > DirectDraw Reference