What is the FIFO Method and How Can it Be Used?

FIFO - Guide to First-In First-Out Inventory Accounting Method

Queue in Data Structure & Basic Operations for Queue | Simplilearn

SOLVED: A queue is an abstract data type that maintains the order in which elements were added to it, allowing the oldest elements to be removed from the front and new elements to be added to the rear. This is called a first-in-first-out (FIFO) data structure because the first element added to the queue (i.e., the one that has been waiting the longest) is always the first one to be removed.

Introduction and Array Implementation of Queue - GeeksforGeeks