The Global Specialties PB-503 Desktop Analog and Digital Design Trainer is designed for all levels of electronics instruction and prototyping. Utilizing the PB-503, students can create and implement their own circuits onto the breadboard, which is removable for multiple student usage in lab settings. The PB-503 can be used to construct basic series and parallel circuits up to the most complicated multi-stage microcomputer circuits, incorporating the latest in industrial technology. For both series and parallel circuits, the PB-503 can also handle much more sophisticated multi-stage microcomputer circuits.