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.
The terms RAM and ROM refer to two types of computer data storage. RAM is an acronym for random access memory, while ROM stands for read-only memory.. RAM and ROM are alike in certain respects as two forms of memory, so they are easily confused. In reality, they each play distinctive roles in the computer.