A queue is a data structure in computer science that is used to store a collection of entities in a sequence. It is open at both ends and operates on a "First In, First Out" (FIFO) basis, meaning that the first element added to the queue will be the first one to be removed. Entities can be added to the back of the queue using the "enqueue" operation, and removed from the front of the queue using the "dequeue" operation. Other operations may include "peek" to view the front element without removing it, "isFull" to check if the queue is full, and "isEmpty" to check if the queue is empty. Queues can be implemented using arrays, linked lists, or pointers, and are used in various programming languages for different applications