Big data refers to large and complex datasets that are difficult to process using traditional database management tools. This document discusses applications of big data in engineering and design. It describes how big data is characterized by its volume, velocity, and variety. Examples are given of how big data is used in engineering companies like Boeing to design and manufacture new products. The document also discusses how big data is important for innovation, customer satisfaction, and competitive advantages. It explores how cloud computing and tools like product lifecycle management can help companies manage and analyze big data.