Big data is large amounts of unstructured data that require new techniques and tools to analyze. Key factors enabling big data are increased storage capacity, processing power, and data availability. Big data analytics can uncover hidden patterns to provide competitive advantages and better business decisions. Applications include healthcare, homeland security, finance, manufacturing, and retail. The big data market is growing rapidly, with 4.4 million IT jobs expected by 2015. India's big data market is also growing and may reach $1 billion by 2015. Non-SQL databases and Hadoop are common tools used for big data.