This document discusses Hadoop and its use for managing large and growing amounts of data beyond what can typically be handled. It provides an overview of the different technological layers that make up Hadoop platforms, including computational runtimes, file systems, infrastructures, and popular distributions. It also discusses how many early adopters of Hadoop may feel disillusioned once their initial problems are solved and provides suggestions for continuing to innovate with Hadoop, such as asking domain experts what new questions can be answered with available or obtainable data in order to develop new data products and services.