This document provides an overview of Supervisory Control and Data Acquisition (SCADA) and Industrial Control Systems (ICS), including fundamentals, evolution over time, vulnerabilities, security frameworks, good practices, and resources. It defines SCADA/ICS, describes how they have become more interconnected, lists vulnerabilities like outdated systems and remote access, outlines security standards like NIST and NERC, recommends practices like segmentation and patching, and provides example frameworks and resources.