PR3-AT PRC-AT Rev L EXTERNAL ISA BUS I/O EXPANSION INTERFACE BOARDPR3 AT PRC AT Rev L External ISA Bus I O Expansion Interface Board The PR3 AT PRC AT Rev L is an external ISA bus I O expansion interface board designed to extend the input output capabilities of ISA based computer systems. It provides a stable and efficient connection between the host system and peripheral devices, enabling increased functionality in industrial, laboratory, and legacy computing environments. Key Specifications: Model: PR3 AT PRC AT