The term "PC" is hardly something anyone, especially Apple, would use to label its Mac computers. After all, it popularized the Mac vs PC ads. But for the sake of statistics and to show that everyone is affected by the PC slump, that is exactly what market analyst IDC did. Labels aside, IDC's figures do reveal how even Apple, whose Macs have traditionally done better even in the face of the PC market's decline, is having some number problems when it comes to shipments. Not exactly welcome news at a time when analysts are predicting continued slowdown of iPhone sales.