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.
Major difference is that electricity is needed to use RAM but this is not true in ROM. There are many difference between RAM and ROM. RAM is used to store only temporary data but ROM is used to store permanent data.Speed of RAM is high because there is very less amount of data stored in it but accessible speed of ROM is slow in compare to RAM.ajor difference is that electricity is needed to use RAM but this is not true in ROM. There are many difference between RAM and ROM. RAM is used to store only temporary data but ROM is used to store permanent data.