Today, while listening to Google scientist Craig Neville-Manning speak, I learned the secret of Google's success… velcro. It turns out that one of Google's core principles is to do things quickly and cheaply. They use tons of commodity PCs, knowing that many of them will fail. But they make up for the failure in software. They practice "reliability through replication," as every PC is duplicated somewhere so that if it fails, the software simply switches to the new one. Once a week someone comes through with a cart and replaces all the hard drives, power supplies, or whatever it may be. To save time, there are no screws. Components are attached with velcro. Unstrap a hard drive, and strap a new one in. Now you know the secret to Google's success.