But still, internally we call it i586, because that's the way it is. so is Pentium MMX which I reckon is called i686.
> The name invoked the number five, but was completely trademarkable, unlike the number 586.
some say that they tried to add 486 with 100 and the result had some numbers after the comma, that's why they named it pentium (yes, i know about the FDIV bug)