A computer memory in which data is stored in semiconductor devices, such as flip-flop circuits and capacitors. Flip-flops are normally used for static storage and capacitors for dynamic storage. Static storage is used for ROM (read-only memory), in which data is programmed when the chip is manufactured. Data can be read from it, but no new data can be written into it. ROM is nonvolatile, meaning that the data remains in ROM even when all computer power is turned off.