AMD

Advanced Micro Devices, Inc. (AMD) is a semiconductor company. AMD is best known for producing CPUs based on x86 intruction set, motherboard chipsets and their own line of GPUs. Later AMD created amd64, which is the 64-bit equivalent instruction set of the x86.

Available software and articles
From Gentoo standpoint this wiki covers the following AMD related articles among others:

Graphics drivers

 * Not (yet) supported by Gentoo.
 * Useful for older graphics adapters.
 * No longer supported by AMD.
 * No longer supported by AMD.

CPUs

 * Ryzen family of AMD CPUs
 * AMD microcode for AMD CPUs