The three-letter abbreviation ADF may refer to:

• Advanced Format, a hard disk technology where sectors are over the 512 bytes limit
• Amiga Disk File
• Amsterdam Density Functional, a computer program for performing density functional theory electronic structure calculations
• AnDan FOSSIL, a FOSSIL driver by AnDan Software
• Application Development Facility, a programming language
• Application Development Framework, a software framework in computer programming
  • Oracle Application Development Framework
• Auto-lead Data Format, an XML-based standard for dealing in vehicles
• Automated Document Factory, a Gartner architecture for printing and mailing
• Automatic document feeder, in printers and scanners
• Automatically defined functions, in genetic programming (computer science)

Alpha Delta Phi (ΑΔΦ, also Alpha Delt, or ADPhi) is a Greek-letter social college fraternity and the fourth-oldest continuous Greek-letter fraternity in the United States and Canada. Alpha Delta Phi was founded on October 29, 1832 by Samuel Eells at Hamilton College and includes former U.S. Presidents, Chief Justices of the U.S. Supreme Court and U.S. Senators among its 50,000+ alumni. Today, the name refers to both the all-male fraternity and the Alpha Delta Phi Society, which separated from the fraternity in 1992 and permits co-educated chapters. The Fraternity and the Society are both derived from Eells's vision for a "literary society," with each chapter upholding its literary tradition. The Dartmouth College chapter was the inspiration for National Lampoon's Animal House.

Amiga Disk File aka ADF is a file format used by Amiga computers and emulators to store images of disks. It has been around almost as long as the Amiga itself, although it was not initially called by any particular name. Before it was known as ADF, it was used in commercial game production, backup and disk virtualization. Technically speaking, ADF is not really a file format but actually a track-by-track dump of the disk data as read by the Amiga operating system, and so the "format" is really fixed-width AmigaDOS data tracks appended one after another and held in a file.

Die Abkürzung ADF steht für

ADF peut signifier :

• ADF, protéine imposant une torsion supplémentaire à l'actine entraînant sa dépolymérisation ;
• un format de fichier Amiga ;
• Asian Dub Foundation ;
• Assemblée des départements de France ;
• Association Dentaire Française ;
• Association pour l'histoire et la défense des dernières familles anoblies par charge ;
• Association vaudoise pour les droits de la femme (voir [1] ;
• Australian Defence Force ;
• une architecture de messagerie et d'impression ;
• Automatic Direction Finder, un type de radiocompas.

Alpha Delta Phi (ΑΔΦ) est la quatrième fraternité étudiante grecque la plus ancienne des États-Unis. Elle fut fondée en 1832 par Samuel Eells à l'Hamilton College de Clinton (New York). Theodore Roosevelt et Franklin Delano Roosevelt en furent membres.

Skrót ADF (ang. Amiga Disk Format) oznacza obraz dyskietki w postaci pliku używanego przez emulatory i komputery Amiga. Pliki w tym formacie były używane już przez gry czy też programy wykonujące kopie zapasowe. Kontroler dyskietek (ang. floppy disk controller, FDC) Amigi jest zdolny do odczytu/zapisu dyskietek Amiga/PC/Macintosh/AppleII/C64. Nie jest natomiast możliwy odczyt dyskietki z Amigi przez standardowy kontroler PC. Jest to również uznawane za przyczynę powstania formatu ADF.