Pushdown may refer to:
*
Pushdown automaton, a concept in theoretical computer science
** More generally, anything relating to a
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 ...
*
Push-down (exercise), a strength-training exercise
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