Stack may refer to:

Places

* Stack Island, an island game reserve in Bass Strait, south-eastern Australia, in Tasmania’s Hunter Island Group * Blue Stack Mountains, in Co. Donegal, Ireland

People

Stack (surname) Stack is a surname of English origin and is commonly found in county Kerry, Ireland. Variants of the name Stack include Stace, Stacy (given name), Stacey, Stacy (disambiguation), Stacy, Stacke and De Staic. It is a baptismal name meaning "Son of Eus ...

(including a list of people with the name) * Parnell "Stacks" Edwards, a key associate in the Lufthansa heist * Robert Stack Pierce (1933–2016), an American actor and baseball player * Brian "Stack" Stevens (1941–2017), a Cornish rugby player * Stacks (rapper) (born 1985), the stage name of the rapper Yannique Barker

Arts, entertainment, and media

* '' Stack magazine'', a bimonthly publication about high school sports * ''Stacks'' (album), a 2005 album by Bernie Marsden * Stacks, trailer parks that were made vertical, in the film '' Ready Player One''

Computing

Stack (abstract data type) In computer science, a stack is an abstract data type that serves as a collection of elements, with two main operations: * Push, which adds an element to the collection, and * Pop, which removes the most recently added element that was not ...

, abstract data type and data structure based on the principle of last in first out ** Stack (C++), a C++ standard container, simulating a stack *

Stack (Haskell) Stack is a tool to build Haskell projects and manage their dependencies. It uses the Cabal library but with a curated version of the Hackage repository called ''Stackage''. Stack competes against Cabal's binary cabal-install and has been cre ...

, a tool to build Haskell projects and manage their dependencies * Stack in Macintosh, one of a collection of documents created with

HyperCard HyperCard is a software application and development kit for Apple Macintosh and Apple IIGS computers. It is among the first successful hypermedia systems predating the World Wide Web. HyperCard combines a flat-file database with a graphical, ...

(as in a stack of virtual cards) * Stack in LiveCode, one of a collection of program scripts created with LiveCode's ''Transcript'' programming language *

Call stack In computer science, a call stack is a stack data structure that stores information about the active subroutines of a computer program. This kind of stack is also known as an execution stack, program stack, control stack, run-time stack, or mach ...

, stack data structure that stores information about the active subroutines of a computer program * Protocol stack, a particular software implementation of a computer networking protocol suite * Solution stack, a group of software systems, increasing in abstraction from bottom to top * Stack-based memory allocation, a memory allocation scheme based on the principle of "last in, first out" * Stacks (Mac OS), a folder view on the Dock of macOS * Stacks blockchain, a Bitcoin smart contract platform

Science and technology

* Stack (geology), a large vertical column of rock in the sea *

Stack (mathematics) In mathematics a stack or 2-sheaf is, roughly speaking, a sheaf that takes values in categories rather than sets. Stacks are used to formalise some of the main constructions of descent theory, and to construct fine moduli stacks when fine modul ...

, a sheaf that takes values in categories rather than sets * Algebraic stack, a special kind of stack commonly used in algebraic geometry ** Stacks Project, an open source collaborative mathematics textbook writing project *

Stacking (chemistry) In chemistry, pi stacking (also called π–π stacking) refers to the presumptive attractive, noncovalent pi interactions (orbital overlap) between the pi bonds of aromatic rings. However this is a misleading description of the phenomena sinc ...

, or pi stacking, attractive, noncovalent interactions between aromatic rings * Yellow stackhousia, a plant *''The Stack'', a political and design theory of planetary-scale computation coined by Benjamin H. Bratton * Stack, an assembled

multistage rocket A multistage rocket or step rocket is a launch vehicle that uses two or more rocket ''stages'', each of which contains its own engines and propellant. A ''tandem'' or ''serial'' stage is mounted on top of another stage; a ''parallel'' stage i ...

Transportation

* Operation Stack, parking lorries on the M20 in Kent, England, when Channel crossings are disrupted *

Stack interchange A directional interchange, colloquially known as a stack interchange, is a type of grade-separated junction between two controlled-access highways that allows for free-flowing movement to and from all directions of traffic. These interchanges ...

, a free-flowing grade-separated junction between two roads * The Stack, the interchange of I-10 and I-17 in Phoenix, Arizona

Other uses

* Stack Ltd, the company that owns 0verflow * Stack (unit), a US unit of volume for stacked firewood * Amp stack, of guitar amplifiers *

Library stack In library science and architecture, a stack or bookstack (often referred to as a library building's ''stacks'') is a book storage area, as opposed to a reading area. More specifically, this term refers to a narrow-aisled, multilevel system ...

, compactly spaced bookshelves in libraries * Smoke stack or chimney ** Flue-gas stack, the industrial terminology for an industrial plant chimney **

Funnel (ship) A funnel is the smokestack or chimney on a ship used to expel boiler steam and smoke or engine exhaust. They are also commonly referred to as stacks. Purpose The primary purpose of a ship's funnel(s) is to lift the exhaust gases clear of the ...

, the smokestack or chimney on a ship * Stack effect, the movement of air into and out of buildings, chimneys, flue-gas stacks, or other containers