[MSDN Library June 1998] Annex A (Informative) - Additional Modem Information (100%)

MSDN Library Visual Studio 6.0 > Specifications > Platforms > Plug and Play External COM Device Specification

[MSDN Library June 1998] Annex C (Informative) - Class Names (87.5%)

MSDN Library Visual Studio 6.0 > Specifications > Platforms > Plug and Play External COM Device Specification

[MSDN Library June 1998] Annex B COM Enumerator Constraints (82.2115384615385%)

MSDN Library Visual Studio 6.0 > Specifications > Platforms > Plug and Play External COM Device Specification