"Mac, PC and Linux machine" ... what's a PC? :-)

It seems some people really think that a PC is equal to a PC running Microsoft Windows. Smile Eg. in this article they wrote:
If you're interested in connecting the N95 to other devices, the developer has you covered with instructions on how to pair up with a Mac, PC or Linux machine.
Imho "Mac" and "Linux" are operating system families/flavours (each covering a number of operating systems), while a "PC" is a piece of hardware that might run a variety of OSes.

PS: I'm completely aware that "Mac" might refer both to the OSes and the computers made by Apple, however in the above context it's clear that they've meant the OS.