The new Top500 list was released recently, and HP (and BladeSystems) again tops the list as the preferred technology choice by this extremely knowledgeable and demanding community of users! What's the Top500? It's a listing of the world's most powerful supercomputing systems, based on the Linpack benchmark, and is compiled twice a year. HP systems power 212 of these 500 sites (42%). Of those, 207 sites deploy HP c-Class BladeSystems, making it the most popular and fastest growing architecture on the list. Notable trends include: the continued growth in InfiniBand as high performance interconnect, especially for the top tier in the Top500; demonstration of Windows HPC scalability, with that technology being used at the #15 site (in Shanghai); and new countries gaining ground in the top tier, such as Saudi Arabia with the #14 spot.