A PriorityQueue is a list that always keeps its items sorted based on some rule, like smallest to largest. So, when you take an item out, you always get the one with the highest (or lowest) priority.

The ConcurrentStack and ConcurrentQueue classes, lock-free and thread-safe implementations of the Stack and Queue classes, build thread safe collections in .Net ...

To remove an item from a queue, use the POPN, POPC, POPL, or POPO function. As with stacks, you should use the ITEMTYPE and LISTLEN functions to verify the item's type and the list's length before ...

Data comes in many shapes and forms (obviously), but two of its core ‘structures’ are stacks and queues. Data elements in a stack and a queue differ by virtue of their order.