Which of the following applications may use a stack?

A stack has only one opening and that is known as top of the stack.

It follows the principle of last-in-first-out (LIFO).

The process of inserting an element at the top position in the stack is known as pusp operation.

The process of deleting an element at the top position in the stack is known as pop operation.

Due to above features, they may be used as a parentheses balancing program, tracking of local variables at run time or compiler syntax analyzer.