# Stack (OS)

The stack of an application is a FIFO queue of stack frames—these contain a function’s parameters, local variables, and return address. These get added when a function is called and removed once a function completes. The stack acts as the control flow for a process , determining where to return to once a function has completed. The stack has a fixed size when a process starts, and if it goes beyond that size, it can cause a stack overflow.