PC should probably be split into Windows and Free OSes, at a minimum. In popular culture it's okay for PCs to refer to windows, but here we'll just get a mix of

PC should probably be split into Windows and Free OSes, at a minimum. In popular culture it's okay for PCs to refer to windows, but here we'll just get a mix of linux/bsd/windows in that category. Unless you consider "other" to be non-Windows.