The Caro–Kann Defence is a chess opening characterised by the moves: The Caro–Kann is a common defence against the King's Pawn Opening and is classified as a "Semi-Open Game" like the Sicilian Defence and French Defence, although it is thought to be more solid and less dynamic than either of those openings.
The Douglas XB-19 was the largest bomber aircraft built for the United States Army Air Forces until 1946.
The Metropolitan Transportation Authority (MTA) operates a number of bus routes in Brooklyn, New York, United States; one minor route is privately operated under a city franchise.
Primate erythroparvovirus 1, generally referred to as B19 virus, parvovirus B19 or sometimes erythrovirus B19, was the first (and until 2005 the only) known human virus in the family Parvoviridae, genus Erythroparvovirus; it measures only 23–26 nm in diameter.
Robert Galbraith Heath (9 May 1915 – 24 September 1999) was an American psychiatrist.