Why is XP called XP? OS X is just using the Roman numeral X and it meant to be pronounced 10 as in Mac OS 10, but people all over the shop are calling it Mac OS EX 10.2 Jaguar or 10.3 Panther. The second of which being the cheekiest move by Apple so far, asking for another £100 for what is essentially an upgrade from OS 10 to OS 10 with hardly anything done to it. :-x If it was OS 10 - 11 I'd understand but this really gets my goat.