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. ­ ­

­In 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:

Let's start by identifying the different types of ROM.­