Linked from
The 14 pages that link to Read-only memory, each with the reason it gives.
MicrocontrollerRelated: Program code and fixed data persist in a microcontroller’s flash memory.
FirmwareRelated: It is one historical storage medium for firmware.
Home computerRelated: ROM commonly stored a home computer’s startup routines and built-in language.
TRS-80Related: The Model I’s ROM held its Level I BASIC interpreter.