Configuration PROMs (Programmable Read-Only Memory) for FPGAs (Field-Programmable Gate Arrays) are used to store configuration data that programs the FPGA at power-up. They provide non-volatile storage, ensuring that the FPGA retains its configuration settings. Configuration PROMs are used in various FPGA-based applications, including communication systems, data processing, and industrial control. Their ability to provide reliable and persistent configuration data makes them essential for ensuring consistent and correct FPGA operation.