read-only memory
US /ˌriːd ˌoʊn.li ˈmem.ər.i/
UK /ˌriːd ˌoʊn.li ˈmem.ər.i/
1.
a type of computer memory that can be read but not easily modified or reprogrammed, typically used for storing firmware or fixed data
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The computer's basic input/output system (BIOS) is stored in read-only memory.
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Unlike RAM, data in read-only memory persists even when the power is turned off.