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 Old Computer is home to the largest collection of roms and emulators anywhere on the web with over 600,000 roms for Nes, Snes, DS, N64, Gameboy, GBA, MAME, Sega, Commodore and PC as well as many other platforms.