What is the difference between x86 and x64
<p>What is the difference between <a href="http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html" rel="nofollow">x86 and x64 binaries here</a>, we would like to download binaries for Windows 7, Ubuntu 12.04 (32 bit options)</p>
