Q4, Q-4 or q4 may refer to: * The fourth quarter of a

calendar year A calendar year begins on the New Year's Day of the given calendar system and ends on the day before the following New Year's Day, and thus consists of a whole number of days. The Gregorian calendar year, which is in use as civil calendar in ...

* The fourth quarter of a

fiscal year A fiscal year (also known as a financial year, or sometimes budget year) is used in government accounting, which varies between countries, and for budget purposes. It is also used for financial reporting by businesses and other organizations. La ...

Q4 (New York City bus) The Q4 bus route constitutes a public transit corridor running along Merrick Road, Merrick Boulevard and the easternmost portion of Linden Boulevard in southeastern Queens, New York City. The route runs from the Jamaica Center–Parsons/Archer ...

, a bus line in Queens * ''

Quake 4 ''Quake 4'' is a 2005 first-person shooter game developed by Raven Software and published by Activision. It is the fourth title in the ''Quake'' series, after the multiplayer ''Quake III Arena'', and a sequel to ''Quake II''. Raven Software co ...

'', a first-person shooter video game developed by Raven Software *

Audi Q4 e-tron The Audi Q4 e-tron is a battery electric compact luxury crossover SUV produced by Audi. It is based on Volkswagen Group's electric MEB platform and is the fourth fully-electric model in the Audi e-tron series after the Audi Q8 e-tron (forme ...

, a compact SUV * Swazi Express Airways IATA airline designator *

Alfa Romeo Alfa Romeo Automobiles S.p.A. () is an Italian carmaker known for its sports-oriented vehicles, strong auto racing heritage, and iconic design. Headquartered in Turin, Italy, it is a subsidiary of Stellantis Europe and one of 14 brands of mu ...

s All Wheel Drive (AWD) system * LNER Class Q4, a class of British steam locomotives * The Cunard Line codename for the ship later named

Queen Elizabeth 2 ''Queen Elizabeth 2'' (''QE2'') is a retired British ocean liner. Built for the Cunard Line, the ship was operated as a transatlantic liner and cruise ship from 1969 to 2008. She was laid up until converted into a floating hotel, operating sin ...

* A shortened name for Section 4, a part of

Co-op City Co-op City (short for Cooperative City) is a cooperative housing development located in the northeast section of the borough of the Bronx in New York City. It is bounded by Interstate 95 to the southwest, west, and north and the Hutchinson River ...

* An abbreviation for "''quaque'' four" (every four) used in medical prescriptions * " Quran 4", the 4th chapter of the Islamic Holy book

See also