Hi, Please pardon me for this stupid question, but this is regarding a confusion I have developed regarding the architectures as listed in arch/ directory: 1) i386 - I understand this is the most commonly used intel IA32 architecture to which all the pentiums, xeons, and 386, 486 etc belong. It also covers the AMD (and other manufacturers') x86 based processors. Is this right? 2) ia64 - This is for the intel 64 bit processors (Itanium). Additionaly, it also covers AMD and other manufacturers' 64 bit processors. Correct? 3) x86_64 - What is this? Secondly, when we talk of 32/64 bit processor, we are talking about the data bus width, right? The same holds when we talk about Operating systems, right? So the size of address bus does not matter? TIA, Rick - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs