MIDE-Disk on Module (DOM) are flash storage modules that can directly connect to a computer motherboard through an IDE connector, functioning like a hard disk drive. There are two main types: 40-pin IDE DOM for larger drives and 44-pin for smaller drives. DOM offers advantages over HDDs like lower power consumption, higher performance, and greater durability from shock and temperature variations. They are often used in embedded systems, industrial automation, POS devices, and other applications.