Di or DI may refer to:
In computing, a Digital Object Identifier or DOI is a persistent identifier or handle used to uniquely identify objects, standardized by the ISO.
Diana, Princess of Wales (Diana Frances; née Spencer; 1 July 1961 – 31 August 1997), was the first wife of Charles, Prince of Wales, who is the eldest child and heir apparent of Queen Elizabeth II.
Diabetes mellitus (DM), commonly referred to as diabetes, is a group of metabolic diseases in which there are high blood sugar levels over a prolonged period.
Madeleine Beth McCann (born 12 May 2003) disappeared on the evening of 3 May 2007 from her bed in a holiday apartment in Praia da Luz, a resort in the Algarve region of Portugal, sparking what one newspaper called "the most heavily reported missing-person case in modern history".
Dissociative identity disorder (DID), previously known as multiple personality disorder (MPD), is a mental disorder characterized by at least two distinct and relatively enduring identities or dissociated personality states that alternately show in a person's behavior, accompanied by memory impairment for important information not explained by ordinary forgetfulness.
Diazepam, first marketed as Valium, is a medication of the benzodiazepine family that typically produces a calming effect.
Dinosaurs are a diverse group of reptiles of the clade Dinosauria that first appeared during the Triassic.
District of Columbia v. Heller, 554 U.S. 570 (2008), was a landmark case in which the Supreme Court of the United States held in a 5-4 decision that the Second Amendment to the United States Constitution applies to federal enclaves and protects an individual's right to possess a firearm for traditionally lawful purposes, such as self-defense within the home.
Diarrhea, also spelled diarrhoea, is the condition of having at least three loose or liquid bowel movements each day.