Pure Data (Pd) is an open-source visual programming language designed for creating interactive computer music and multimedia works. It allows users to manipulate audio, video, and graphical data in real-time through a graphical interface, making it accessible for artists, musicians, and developers. Developed by Miller Puckette in the 1990s, Pure Data is based on the concept of patching, where users connect various objects to create complex audio and visual systems. Its flexibility and extensibility have led to a vibrant community that contributes libraries and tools, enhancing its capabilities for creative projects.