In computing
- Stack, a data structure based on Last In, First Out (LIFO)
- Call stack of a program, also known as a function stack, execution stack, control stack, or simply the stack
- Protocol stack, a particular software implementation of a computer networking protocol suite
- Solution stack, set of software subsystems or components needed to deliver a fully functional solution
- Stacks (software), a Dock feature found on Mac OS X v10.5 "Leopard"
In mathematics
- Stack (descent theory), general category-theoretical concept to formalise "pull-back" operations in geometry and algebra
- Algebraic stack, a generalisation of scheme and algebraic space in algebraic geometry; a specific type of stack (descent theory)
Other
- Chimney, in the term "smoke stack"
- Flue gas stacks, the industrial terminology for an industrial plant chimney
- Stack (geology), a large vertical column of rock in the sea
- A book stack, a way to organize books in a library.
- Brian 'Stack' Stevens, a Cornish rugby player
- Stacks (rapper), the stage name of the rapper Yannique Barker.
- An amplifier stack, as used in guitar terminology
- To fall over, as used in skating slang.
- Flesh-n-Bone who is also known as "stack"
