The scanning software scrolls through the onscreen menus and applications allowing the switch operator to select menu items, navigate dialogue screens and enter text. Scanning software allows a computer user to operate a computer through a switch. Neat version 4 was buggy, slow to load, slow to work, and crashed often. They work with any Twain software which is a good thing, because the Neat software is a nightmare. The scanners are competent, inexpensive, and Twain compatible.