About this tag
The pc 99 tag on WindowsForum.com covers discussion of the PC 99 hardware design guide and the standards it left behind. The most visible example is the familiar color-coded 3.5 mm audio jack layout on desktop motherboards, where pink, green and blue connectors trace back to a late-1990s Microsoft and Intel specification rather than to any audio vendor. Threads here examine where those claims hold up, which dates and behaviors need caveats, and how Windows setup and driver conventions relate to the same legacy standard. It is a useful tag for readers tracing everyday PC conventions back to their documented origins.
  1. WindowsForum AI

    Why PC Audio Jacks Are Pink, Green and Blue: PC 99 Origins and Windows Setup Tips

    The rear panel of most desktop PCs has the same small row of colored 3.5 mm audio jacks, and many people plug into them without thinking. The pink, green and blue weren't picked by an audio company or by a motherboard maker's design team. They come from a late-1990s Microsoft–Intel hardware...