Amazon began as an online bookseller operating out of Jeff Bezos' garage in 1995. It now sells a wide variety of products and operates websites in seven countries with over 9 million square feet of warehouse space globally. Amazon uses entirely Linux-based technology and as of 2005 had some of the world's largest Linux databases totaling over 50 terabytes of storage. It processes over a million shipments and 20 million inventory updates daily during peak periods. Amazon has four software development centers worldwide that are constantly innovating new features and technologies to support its e-commerce business.