V4 or V-4 may refer to:

Science and technology

LNER Class V4 The London and North Eastern Railway Class V4 was a class of 2-6-2 steam locomotive designed by Sir Nigel Gresley for mixed-traffic use. It was Gresley's last design for the LNER before he died in 1941. The V4s had similarities in their appearan ...

, a British steam locomotive *

V4 engine A V4 engine is a four-cylinder piston engine where the cylinders share a common crankshaft and are arranged in a V configuration. The V4 engine is less common compared to straight-four engines. However, V4 engines have been used in automobiles ...

, a V engine with four cylinders in two banks of two cylinders *

Visual area V4 The visual cortex of the brain is the area of the cerebral cortex that processes visual information. It is located in the occipital lobe. Sensory input originating from the eyes travels through the lateral geniculate nucleus in the thalamus and ...

, in the visual cortex *

Klein four-group In mathematics, the Klein four-group is a Group (mathematics), group with four elements, in which each element is Involution (mathematics), self-inverse (composing it with itself produces the identity) and in which composing any two of the three ...

, in mathematics * V.4, an ITU-T recommendation for data transmission *

ATC code V04 V04B Urine tests :''Empty group'' V04C Other diagnostic agents V04CA Tests for diabetes :V04CA01 Tolbutamide :V04CA02 Glucose V04CB Tests for fat absorption :V04CB01 Vitamin A concentrates V04CC Tests for bile duct patency :V04CC01 Sorbitol : ...

''Diagnostic agents'', a subgroup of the Anatomical Therapeutic Chemical Classification System * The V4

JavaScript JavaScript (), often abbreviated as JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2022, 98% of Website, websites use JavaScript on the Client (computing), client side ...

engine for

QML QML (Qt Modeling Language) is a user interface markup language. It is a declarative language (similar to CSS and JSON) for designing user interface–centric applications. Inline JavaScript code handles imperative aspects. It is associated wi ...

* V₄, one of six precordial leads in

electrocardiography Electrocardiography is the process of producing an electrocardiogram (ECG or EKG), a recording of the heart's electrical activity. It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the hear ...

Other uses

Visegrád Group The Visegrád Group (also known as the Visegrád Four, the V4, or the European Quartet) is a cultural and political alliance of four Central European countries: the Czech Republic, Hungary, Poland, and Slovakia. The alliance aims to advance co-o ...

, an alliance of four Central European states - Czech Republic, Hungary, Poland and Slovakia * ''

Rheinbote ''Rheinbote'' (''Rhine Messenger'', or V4) was a German short range ballistic rocket developed by Rheinmetall-Borsig at Berlin-Marienfelde during World War II. It was intended to replace, or at least supplement, large-bore artillery by providing f ...

'' or V-4, a German World War II four-stage missile *

Saint Kitts & Nevis Saint Kitts and Nevis (), officially the Federation of Saint Christopher and Nevis, is an island country and microstate consisting of the two islands of Saint Kitts and Nevis, both located in the West Indies, in the Leeward Islands chain o ...

(ITU prefix) *

Vieques Air Link Vieques Air Link (VAL, IATA code:V4) is a small Puerto Rico-based airline that links Vieques with Culebra and mainland Puerto Rico. History Operations began during 1965, with owner Osvaldo "Val" Gonzalez-Duriex piloting a plane with three ...

(IATA airline code) * V4, a

grade (climbing) In rock climbing, mountaineering, and other climbing disciplines, climbers give a grade to a climbing route or boulder problem, intended to describe concisely the difficulty and danger of climbing it. Different types of climbing (such as sport ...

for difficulty of a boulder climbing route

Science and technology

Other uses

See also