What Do You Know About Computer ROM?

ROM stands for read only memory. The instruction in ROM prepares the computer for use. These instructions can only be read but cannot be changed or deleted. It is not possible to write new information and instruction into the ROM.

ROM stores data and instruction permanently. When the power is switched off, the instructions stored in ROM are not lost. Therefore ROM is called non-volatile memory. The information in ROM is stored by the manufacturer. When the computer is switched on, the instruction in ROM are automatically loaded into memory of the computer.

PROM: PROM stand for programmable read only memory. In PROM chip the user can write its own instructions but only once. If there is any error in writing the instructions the error cannot be removed from the PROM. The chip becomes unusable.

EPROM: EPROM stands for erasable programmable read-only memory. User can erase instructions or data stored in EPROM chip by exposing the chip to ultraviolet light and write new program.

EEPROM: EEPROM stands for electronically erasable programmable read-only memory. In this memory user can erase and write instructions with the help of electrical pulses. If there is any error in writing the instructions the user can erase the contents electrically.

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