Stack (descent theory), general category-theoretical concept to formalise "pull-back" operations in geometry and algebraAlgebraic stack, a generalisation of scheme and algebraic space in algebraic geometry; a specific type of the aboveAn old term for a sheaf (mathematics).
Computers
Stack (data structure), abstract data type and data structure based on the principle of Last In First Out (LIFO)Stacks (software), a folder view on the Dock of Mac OS XStack-based memory allocationCall stackProtocol stack, a particular software implementation of a computer networking protocol suiteSolution stack, a group of software systems, increasing in abstraction from bottom to top.
People
Brian 'Stack' Stevens, a Cornish rugby playerJoseph Stack, an American who flew an aircraft into an Austin, Texas building to attack the IRSStacks (rapper), the stage name of the rapper Yannique Barker born 1985Robert Stack (1919 – 2003) American actor
Technology
Flue gas stacks, the industrial terminology for an industrial plant chimneyGuitar amplifier stack, as used in guitar terminologySmoke stack, a chimneyStack interchange, a free-flowing grade separated junction between two roads
The Stack, the interchange of I-10 and I-17 in Phoenix, ArizonaStacking (chemistry), also called pi stacking, refers to attractive, noncovalent interactions between aromatic rings
Other
Stack (geology), a large vertical column of rock in the seaStack magazine, a bimonthly publication about high school sports
