We were hardly shocked to see Fujitsu atop the most recent list of the world's fastest supercomputers, but perhaps more surprising is the fact that Amazon cracked the top 50, as well. Turns out, the company's Elastic Compute Cloud (EC2) servers are powered by a Linux-based, 240-teraflop beast that boasts 17,024 cores, 66,000 GB of memory, and a ten gigabit Ethernet interconnect. That's good for 42nd place on Top 500's global rankings, and it's also good enough to power Silk, the browser you'll find on the Kindle Fire. But Amazon has a long way to go before catching up with the Fujitsu K, which recently cracked that vaunted ten petaflop barrier.