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.
Here are the top five differences between the two types of memory: RAM is Random Access Memory. ROM is Read Only Memory. RAM is the memory available for the operating system, programs and processes to use when the computer is running.ROM is the memory that comes with your computer that is pre-written to hold the instructions for booting-up the computer.OM is Read Only Memory. RAM is the memory available for the operating system, programs and processes to use when the computer is running. ROM is the memory that comes with your computer that is pre-written to hold the instructions for booting-up the computer.