DIA or Dia may refer to:
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.
Diarrhea, also spelled diarrhoea, is the condition of having at least three loose or liquid bowel movements each day.
Diamond (pronunciation: /ˈdaɪəmənd/ or /ˈdaɪmənd/) is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice.
The Diagnostic and Statistical Manual of Mental Disorders (DSM), published by the American Psychiatric Association (APA), offers a common language and standard criteria for the classification of mental disorders.
Diane Keaton (born Diane Hall; January 5, 1946) is an American film actress, director and producer. She began her career on stage and made her screen debut in 1970. Her first major film role was as Kay Adams-Corleone in The Godfather (1972), but the films that shaped her early career were those with director and co-star Woody Allen, beginning with Play It Again, Sam in 1972. Her next two films with Allen, Sleeper (1973) and Love and Death (1975), established her as a comic actor.
Diabetes mellitus type 2 (also known as type 2 diabetes) is a long term metabolic disorder that is characterized by high blood sugar, insulin resistance, and relative lack of insulin.
Diana Ernestine Earle Ross (born March 26, 1944) is an American singer, songwriter, actress and record producer.
Dianne Goldman Berman Feinstein (/ˈfaɪnstaɪn/; born Dianne Emiel Goldman; June 22, 1933) is the senior United States Senator from California.