ROM is non-volatile, whereas RAM is volatile., , ROM stores the BIOS and bootstrap program., , RAM stands for Random Access Memory whereas ROM stands for Read Only Memory., , RAM can be upgraded whereas ROM cannot., , Non-volatile memory keeps its contents even when the computer is switched off. Volatile memory loses its contents when unpowered., , ROM stores the BIOS (Basic Input Output System) and bootstrap program., , ROM is measured in megabytes whereas RAM is measured in Megabytes., , RAM can be written to and read from whereas ROM is read only and cannot be written to., , RAM is used to hold data and instructions that are currently in use., , BIOS runs as soon as the computer is switched on. It checks that the hardware is functioning correctly., , Bootup or bootstrap program loads the computer's operating system from the hard drive into the RAM., .

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