BackplanesBoxes, enclosures, and racks are protective structures that are used to house and organize electronic equipment. Backplanes are printed circuit boards that are used to connect multiple circuit boards together in a parallel fashion, allowing them to share information and resources. In the context of boxes, enclosures, and racks, backplanes are often used to create modular systems where multiple circuit boards can be easily added or removed without affecting the overall system. This allows for greater flexibility and scalability in the design of electronic systems.