The Internet of Things (IoT) is a network of physical objects, devices, vehicles, buildings, and other items that are embedded with sensors, software, and network connectivity. IoT can enable a wide range of applications, such as smart homes, smart cities, and industrial automation. Popular IoT platforms include Arduino, Raspberry Pi, and Particle. Get started A version control system (VCS) is a software tool that helps developers manage changes to source code over time. VCSs allow developers to track changes, collaborate with others, and revert to previous versions of code. Examples of VCSs include Git and Subversion.