Apple Inc.'s MFi Program, referring to "Made for iPhone/iPod/iPad", is a licensing program for developers of hardware and software peripherals that work with Apple's iPod, iPad and iPhone. The name is a shortened version of the long-form Made for iPod, the original program that ultimately became MFi.
The MFi program covers various device connectors including the headphone jack, original dock connector and the newer Lightning connector, as well as AirPlay support. Companies joining the MFi program and passing certification tests are able to display certain MFi-related logos on their product packaging, like the "Made for iPod" badge.