Citaat uit webref:
Windows XP Embedded is a specialized operating system, consisting of componentized Windows XP Professional features and an end-to-end set of development tools, for use in non-personal computer (non-desktop) devices.
Het gaat dus m.i. over niet-PC-apparatuur.

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Note added at 1 day 2 hrs 58 mins (2005-01-05 20:06:26 GMT)
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Voorbeelden van bedoelde apparatuur:
Windows Embedded is a family of operating system software from Microsoft for use in non-personal computer devices such as cash registers, automated teller machines (ATMs), industrial controllers, gateways, Internet Protocol (IP) telephones, server appliances, Windows-based thin clients, advanced consumer electronics, and specialized handheld devices. The Microsoft family of embedded operating systems is based on Windows technologies and consists of Windows CE and Windows XP Embedded.