Ryzen is a brand of x86-64 microprocessors designed and marketed by Advanced Micro Devices, Inc. (AMD) for desktop, mobile and embedded platforms based on the Zen microarchitecture. It consists of central processing units marketed for mainstream, enthusiast and workstation segments and accelerated processing units (APUs) marketed for mainstream and entry-level segments and embedded applications. Ryzen is especially significant for AMD, since it is a completely new design, and marks the corporation's return to the high-end desktop CPU market. AMD's competitor Intel controlled this section of the market for the ten years starting 2006, when Intel released the groundbreaking Core microarchitecture derived from the Pentium 3, which continues to underpin its CPU designs today. Also of note is the failed release of AMD's infamous Bulldozer microarchitecture in 2011 for the sole purpose of focusing on "APU development" for 5 years up until the first generation Ryzen processors were released in 2017.