United States military aircraft designation systems
The United States Military Aircraft Designation System was first designed in 1919 when the US Army's Aeronautical Division became the United States Army Air Service. Before this aircraft were put into service under their manufacturers' designations.
History
United States Army Air Service 1919 to 1924
During this period Type Designations used by the United States Army Air Service were allotted, using two or three letters, which were an abbreviation of the aircraft's purpose. Examples include GA for Ground Attack aircraft; NO for Night Observation aircraft and NBS for Night Bombardment, Short Distance aircraft.
Army aviation 1924 to 1962
From 1924 to 1947 the Air Service, United States Army Air Corps, United States Army Air Forces and United States Air Force used a designation system based on mission category, with each model in a category numbered sequentially. In 1947, the designation system was extensively overhauled, with several categories being dispensed with, and others renamed For instance, the Lockheed P-80 Shooting Star (Pursuit) was redesignated as F-80 (Fighter), while the A-26 medium bomber/attack aircraft was redesignated as the B-26, reusing the designation, the Martin B-26 having retired in the meantime.
B-52 (cocktail)
The B-52 (also B52 or Bifi) cocktail is a layered shot composed of a coffee liqueur (Kahlúa), an Irish cream (Baileys Irish Cream), and a triple sec (Cointreau). When prepared properly, the ingredients separate into three distinctly visible layers (due to their relative densities).
History
The name refers from the US B-52 Stratofortress long-range bomber. This bomber was used in the Vietnam War for the release of incendiary bombs, which likely inspired today's flaming variant of the cocktail; another hypothesis centers on B-52 combat losses ("Burns like a B-52 over Hanoi").
One story behind the B-52 is that it was invented by Peter Fich, a head bartender at the Banff Springs Hotel in Banff, Alberta. He named all of his new drinks after favourite bands, albums and songs. This drink was, of course, named after the band of the same name. One of his first customers for a B-52 owned restaurants in various cities in Alberta and liked the drink so much that he put it on the menu. This is why this, the first shooter, is commonly believed to originate at the Keg Steakhouse in Calgary, Alberta in 1977. The B-52 is also rumoured to have been created by Adam Honigman, a bartender at New York City's Maxwell's Plum.
B52 (disambiguation)
The Boeing B-52 Stratofortress is an American strategic bomber aircraft.
B-52 or B52 may also refer to:
Transportation and military
Other uses
- The B-52's (album), an album by the eponymous group
Book
A book is a set of written, printed, illustrated, or blank sheets, made of ink, paper, parchment, or other materials, fastened together to hinge at one side. A single sheet within a book is a leaf, and each side of a leaf is a page. A set of text-filled or illustrated pages produced in electronic format is known as an electronic book, or e-book.
Books may also refer to works of literature, or a main division of such a work. In library and information science, a book is called a monograph, to distinguish it from serial periodicals such as magazines, journals or newspapers. The body of all written works including books is literature. In novels and sometimes other types of books (for example, biographies), a book may be divided into several large sections, also called books (Book 1, Book 2, Book 3, and so on). An avid reader of books is a bibliophile or colloquially, bookworm.
A shop where books are bought and sold is a bookshop or bookstore. Books can also be borrowed from libraries. Google has estimated that as of 2010, approximately 130,000,000 unique titles had been published. In some wealthier nations, printed books are giving way to the usage of electronic or e-books, though sales of e-books declined in the first half of 2015.
Book (graph theory)
In graph theory, a book graph (often written 
) may be any of several kinds of graph.
One kind, which may be called a quadrilateral book, consists of p quadrilaterals sharing a common edge (known as the "spine" or "base" of the book). A book of this type is the Cartesian product of a star and K2 .
A second type, which might be called a triangular book, is the complete tripartite graph K1,1,p. It is a graph consisting of 
triangles sharing a common edge. A book of this type is a split graph.
This graph has also been called a 
.
Given a graph 
, one may write 
for the largest book (of the kind being considered) contained within .
The term "book-graph" has been employed for other uses. Barioli used it to mean a graph composed of a number of arbitrary subgraphs having two vertices in common. (Barioli did not write for his book-graph.)
Theorems on books
Denote the Ramsey number of two (triangular) books by 
, then 
(proved by Rousseau and Sheehan).
such that whenever 
.Book (disambiguation)
A book is a set or collection of written, printed, illustrated, or blank sheets, made of paper, parchment, or other material, usually fastened together to hinge at one side.
Book or Books may also refer to:
Podcasts:
