This document provides an overview of the Industrial Internet of Things (IIoT) and Data Distribution Service (DDS) as a platform for IIoT integration. It discusses how many industries are facing disruption from trends like decentralized energy and software-driven transportation. The key challenge for IIoT is reducing the exponential increase in integration costs as systems scale up in size and complexity. DDS provides a standardized, data-centric integration approach for real-time IIoT applications and services.