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.
Sound cards are internal hardware devices that plug into the motherboard. Examples: Click image to zoom in and retrieve more information. #. A sound card's main function is to allow the computer system to produce sound but they also allow users to connect microphones in order to input sounds into the computer.he video to the right shows how data is read/written to the hard disk drive by spinning a platter across a read/write head. The read/write head is on the end of a movable arm. Features of External Hardware Computer Components. External computer components connect to a computer system from OUTSIDE.