x86-64, also known as AMD64, is a 64-bit version of the x86 instruction set designed by AMD. It supports vastly more physical and virtual memory than 32-bit systems, enabling advanced 64-bit computing.

This domain was originally owned by CodeSourcery, a company renowned for its contributions to GNU toolchains and software tools that optimize hardware performance. Supported by AMD, CodeSourcery's expertise in open-source software development and compiler technology marked a period of significant advancement. Presently, the domain exists independently, open to new opportunities.