# Stack

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) (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
* Robert Stack (1919 – 2003), and American actor and television show host
* Brian "Stack" Stevens (1941–2017), a Cornish rugby player

## 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), abstract data type and data structure based on the principle of last in first out
* Stack (Haskell), a tool to build Haskell projects and manage their dependencies
* Stack in Macintosh, one of a collection of documents created with HyperCard (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, stack data structure that stores information about the active subroutines of a computer program
* Stack machine, an architecture centered around a pushdown stack
* 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), 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), or pi stacking, attractive, noncovalent interactions between aromatic rings
* Yellow stackhousia, a plant
* The stack (philosophy), a political and design theory of planetary-scale computation coined by Benjamin H. Bratton
* Stack, an assembled multistage rocket
* Stack (microelectronics), a two-layer gate insulator in MOSFET, usually high-κ-oxide over SiO$_2$

## Transportation

* Operation Stack, parking lorries on the M20 in Kent, England, when Channel crossings are disrupted
* Stack interchange, 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, compactly spaced bookshelves in libraries
* Smoke stack or chimney
** Flue-gas stack, the industrial terminology for an industrial plant chimney
** Funnel (ship), 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