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.
How ROM Works. 2008 HowStuffWorks ROM is used in most electronic devices. See more computer memory pictures. Read-only memory (ROM), also known as firmware, is an integrated circuit programmed with specific data when it is manufactured. ROM chips are used not only in computers, but in most other electronic items as well. Â­ Â­. Â­In this article, you will learn about the different types of ROM and how each works. This article is one in a series of articles dealing with computer memory, including: