The Apple Cinema HD Display is a series of high-resolution LCD monitors designed by Apple, typically used with Apple computers but also compatible with Windows PCs (with the right adapters and drivers). These monitors usually connect through DVI or Mini DisplayPort/Thunderbolt (depending on the specific model) and can display high-definition content.
When using an Apple Cinema HD Display on a Windows computer, you might need a driver to ensure the display functions correctly, including support for high resolutions and color accuracy.