IBA file format is used by Apple iBooks Author, a software for creating and typesetting books with multimedia elements. IBA files store text and graphical elements in the form of ZIP archives.

IBA format’s main advantage is that the file can be exported into many different formats, including formats native to Apple computers (IBOOKS and ITMSP), or such formats as PDF or TXT. Created documents can be published on internet store Apple Book Store and sold there.