Us and Them: Symphonic Pink Floyd is an instrumental album of Pink Floyd songs. The album was arranged by Jaz Coleman, produced by Youth and performed by the London Philharmonic Orchestra conducted by Peter Scholes. The album cover was painted by Roger Dean who is known for his organic paintings. He also designed albums for Asia, Uriah Heep, and Yes. The album, which features six songs taken from The Dark Side of the Moon released in 1973 and three from The Wall released in 1979, peaked at number one in the Billboard Magazine Top Classical Crossover Albums chart. Track listing Sin...

In computer science, a double-ended queue (dequeue, often abbreviated to deque, pronounced deck) is an abstract data type that generalizes a queue, for which elements can be added to or removed from either the front (head) or back (tail). It is also often called a head-tail linked list, though properly this refers to a specific data structure implementation (see below). Naming conventions Deque is sometimes written dequeue, but this use is generally deprecated in technical literature or technical writing because dequeue is also a verb meaning "to remove from a queue". Nevertheless, seve...

A skip list is a data structure for storing a sorted list of items using a hierarchy of linked lists that connect increasingly sparse subsequences of the items. These auxiliary lists allow item lookup with efficiency comparable to balanced binary search trees (that is, with number of probes proportional to log n instead of n). Each link of the sparser lists skips over many items of the full list in one step, hence the structure's name. These forward links may be added in a randomized way with a geometric / negative binomial distribution. Insert, search and delete operations are per...