Pushdown may refer to:
*
Pushdown automaton
In the theory of computation, a branch of theoretical computer science, a pushdown automaton (PDA) is
a type of automaton that employs a stack.
Pushdown automata are used in theories about what can be computed by machines. They are more capab ...
, 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 push-down is a strength training exercise used for strengthening the triceps muscles in the back of the arm. This exercise can also be called a triceps push-down or a two-armed standing triceps extension.
The exercise is completed by pushing ...
, a strength-training exercise
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