This document discusses various big data technologies and applications including classification algorithms, segmentation, sentiment analysis, competitive analysis, text analysis, data enrichment, and user experience. Specifically, it outlines how these techniques can be used in retail, government, travel, and insurance for applications such as customer profiling, product recommendations, policy formulation, price analytics, customer feedback analysis, and enhancing existing databases. It also discusses technology trends related to big data such as the growth of unstructured data, mobile apps, social networks, and the internet of things.