Dup or DUP may refer to:
E. I. du Pont de Nemours and Company, commonly referred to as DuPont, is an American conglomerate that was founded in July 1802 as a gunpowder mill by French-American chemist and industrialist Éleuthère Irénée du Pont.
Dupuytren's contracture (also known as Dupuytren's disease, or by the slang term "Viking disease") is a flexion contracture of the hand due to a palmar fibromatosis, in which the fingers bend towards the palm and cannot be fully extended (straightened).
Dupnitsa (Bulgarian: Дупница (previously Дубница), sometimes transliterated Dupnica) is a town in western Bulgaria.
DuPage County is a county in the U.S. state of Illinois, and one of the collar counties of the Chicago metropolitan area.
The Duployan shorthand, or Duployan stenography (French: Sténographie Duployé), was created by father Émile Duployé in 1860 for writing French.
Dupont Circle is a traffic circle, park, neighborhood, and historic district in Northwest Washington, D.C.
The Dupont de Ligonnès murders and disappearance involved the murder of five members of the same family in Nantes, in the département of Loire-Atlantique in north-western France, followed by the disappearance of the father of the family.
duPont Manual High School is a public magnet high school located in the Old Louisville neighborhood of Louisville, Kentucky, USA and serving students in grades 9–12. It is a part of the Jefferson County Public School District.
A duplex communication system is a point-to-point system composed of two connected parties or devices that can communicate with one another in both directions.