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.
RAM (Random Access Memory) A type of computer memory circuit that holds data, program instructions and the operating system while the computer is on. RAM holds raw data that is waiting to be processed, as well as the instructions that will process the raw data. In addition, RAM holds processed data before it is stored more permanently on disk.