The oral mucosa in the area of crenation is usually of normal color, but there may be erythema (redness) if exposed to a high degree of friction or pressure. Crenated tongue is usually asymptomatic and harmless.
ROM stands for read-only memory. It's used to store the start-up instructions for a computer, also known as the firmware. Most modern computers use flash-based ROM. It is part of the BIOS chip, which is located on the motherboard.
Short for read-only memory. Computer hardware that holds permanently stored data. After the data is installed in ROM, it cannot be added to, modified, or deleted. ROM usually contains instructions that enable the computer's operating system to communicate with other hardware.