Nero Burning ROM works with a number of optical disc image formats, including the raw uncompressed image following the ISO9660 standard, and Nero's proprietary NRG file format. Depending on version more image formats may be natively supported.
Nero Burning Rom - the full version of the application, intended for advanced PC users.
Nero Express - a simplified edition of Nero Burning ROM targeted at entry-level users, is available with the Nero software suite. Although Nero Express is not as powerful as the full-featured Nero Burning ROM, it features a more streamlined user interface, and offers a broader range of features than those offered by Windows. Nero Express is also integrated into Nero software suite, especially into OEM editions of this software which lack Nero Burning ROM.
Nero Kwik Burn is a component of the freeware software suite Nero Kwik Media and provides only basic CD/DVD copying and creation options. It was initially released alongside version 18.104.22.168 as a standalone program called Nero BurnLiteNero BackItUp: a system backup utility. It was integral part of Nero suites.With the introduction of Nero 9 Nero BackItUp 4 became a standalone backup product, while its successor, Nero BackItUp 5, was the main application of Nero BackItUp & Burn  This product was later on re-integrated in Nero Multimedia Suite 10 and now include in the Nero 11. The product is available separately to buy.