Chapter 5. Stack and Queue¶ Abstract Stacks are like stacking cats, while queues are like cats lining up. They respectively represent the logical relationships of Last-In-First-Out (LIFO) and First-In-First-Out (FIFO). Chapter Contents¶ 5.1 Stack 5.2 Queue 5.3 Double-ended Queue 5.4 Summary Feel free to drop your insights, questions or suggestions