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First, letâs define each of these terms: 1  Push System: is a system in which we produce goods based on our best projections of what the market wants. 2  Pull System: is a system in which the production of goods is initiated by the person or organization who consumes that good.
Key difference: PUSH is when an entry is pushed onto the stack. POP is when the last pushed entry is popped off the stack. PUSH and POP are commands used on a stack. In computer science, a stack is an area of memory that holds all local variables and parameters used by any function. This is essential as a stack remembers the order in which functions are called so that function returns occur correctly.