Data science isn’t a common term. So let’s start with an increasingly popular term: big data. Big data earned buzz word status with employers several years ago, and numerous vendors are now talking about big data in libraries. Big data generally refers to the storage and management of large data sets. In this field, it would not be uncommon to work with a sizable datasets of five terabytes or larger. By comparison, five terabytes would hold approximately one million music tracks (85,000 hours of music).