ROMs, or Read-Only Memory, are a type of computer memory that is used to store data that should not be modified or erased easily. Unlike RAM (Random Access Memory), which is temporary and volatile, ROM retains its information even when the power is turned off. This makes it ideal for storing firmware, which is essential software that helps hardware function properly. ROMs come in various forms, including PROM (Programmable Read-Only Memory) and EPROM (Erasable Programmable Read-Only Memory). These types allow for some level of modification, but they are still primarily used for permanent data storage. Overall, ROMs play a crucial role in the operation of many electronic devices, including computers and gaming consoles.