関連ワード:  which memory type is not volatile    which memory type is non volatile    which memory type is non volatile but can be erased and reprogrammed    which memory type is non volatile and used to store firmware    which memory type is non volatile and often used for firmware storage    which memory type is non volatile and cannot be modified easily    which memory type is non volatile and can be electrically erased and reprogrammed    which memory type is considered non volatile    which storage devices memory type is non volatile    which of the following memory type is non volatile