Category
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navigation
thumb|A navigation system on an oil tanker
Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another. The field of navigation includes four general categories: land navigation, marine navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's position compared to known locations or patterns. Navigation, in a broader sense, can refer to a

bibliography
thumb|250px|Bibliographies at the University Library of Graz
Bibliography (from and ), as a discipline, is traditionally the academic study of books as physical, cultural objects; in this sense, it is also known as bibliology (from ). English author and bibliographer John Carter describes bibliography as a word having two senses: one, a list of books for further study or of works consulted by an author (or enumerative bibliography); the other one, applicable for collectors, is "the study of books as physical objects" and "the systematic description of books as objects" (or descriptive bibliog
heraldry
thumb|The German Hyghalmen Roll was made in the late 15th century and illustrates the German practice of repeating themes from the arms in the crest. (See [[Roll of arms).]]
mass–energy equivalence
physical law relating mass to energy

Faust
play by Johann Wolfgang von Goethe
children's literature
stories, books, magazines, and poems that are primarily written for children

Catherine of Aragon
first wife of Henry VIII of England (1485–1536)
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Septuagint
The Septuagint ( ), sometimes referred to as the Greek Old Testament or The Translation of the Seventy (), and abbreviated as LXX, is the earliest extant Greek translation of the Hebrew Bible from the original Biblical Hebrew. The full Greek title derives from the story recorded in the Letter of Aristeas to Philocrates (his brother) that "the laws of the Jews" were translated into the Greek language at the request of Ptolemy II Philadelphus (285–247 BC) by seventy-two Hebrew translators—six from each of the Twelve Tribes of Israel—though this story is considered to be pseudepigraphical by some
Fatehpur Sikri
town in Agra District, Uttar Pradesh, India
visible spectrum
portion of the electromagnetic spectrum that is visible to the human eye

O Canada
national anthem of Canada
Russian literature
literature of Russia and in Russian language
Cardinal Mazarin
French cardinal and statesman
flag of South Korea
national flag of the Republic of Korea
Intergovernmental Panel on Climate Change
scientific intergovernmental body
World Meteorological Organization
specialized agency of the United Nations for meteorology
Sunderland
Sunderland () is a port city and metropolitan borough in Tyne and Wear, England. It is a port at the mouth of the River Wear on the North Sea, approximately south-east of Newcastle upon Tyne. It is the most populous settlement in the Wearside conurbation and the second-most populous settlement in North East England, after Newcastle.

Pietermaritzburg
Pietermaritzburg (; ) is the capital and second-largest city in the province of KwaZulu-Natal, South Africa after Durban. It was named in 1838 and is currently governed by the Msunduzi Local Municipality.
Apache
The Apache ( ) are several Southern Athabaskan language-speaking peoples of the Southwest, the Southern Plains and Northern Mexico. They are linguistically related to the Navajo. They migrated from the Athabascan homelands in the north into the Southwest between 1000 and 1500 CE.

Megadeth
Megadeth is an American heavy metal band formed in Los Angeles in 1983 by vocalist and guitarist Dave Mustaine. Known for their technically complex guitar work and musicianship, Megadeth is one of the "big four" of American thrash metal—along with Slayer, Anthrax, and Metallica—and is credited with helping to develop and popularize the genre. Their music features intricate arrangements, fast rhythm sections, dual lead guitars, and lyrical themes such as war, conflicts, politics, religion, death, and personal relationships.
Orion Nebula
diffuse nebula
Il Canto degli Italiani
national anthem of Italy
Ferdinand I, Holy Roman Emperor
Holy Roman Emperor of the Habsburg dynasty and king of Bohemia, Croatia and Hungary (1503–1564)
1939 Invasion of Poland
German, Soviet, and Slovak attack on and takeover of Poland that marked the start of World War II
German Confederation
Confederation of States in Germany from 1815 to 1866
Book of Judith
book in the Septuagint, regarded as canonical in Roman Catholicism and Eastern Orthodoxy, about the story of the widow Judith who assassinates an enemy general, Holofernes
Four Noble Truths
basic framework of Buddhist thought
Zosimus
pope
polyhedron
In geometry, a polyhedron (: polyhedra or polyhedrons; ) is a three-dimensional figure with flat polygonal faces, straight edges and sharp corners or vertices. The term "polyhedron" may refer either to a solid figure or to its boundary surface. The terms solid polyhedron and polyhedral surface are commonly used to distinguish the two concepts. Also, the term polyhedron is often used to refer implicitly to the whole structure formed by a solid polyhedron, its polyhedral surface, its faces, its edges, and its vertices.
harvest
thumb|Harvesting in Volgograd Oblast, State farm
thumb|Straw in a field in [[Schleswig-Holstein, Germany.]]
Seventh-day Adventist Church
Protestant Christian denomination
Church of the Holy Sepulchre
church in Jerusalem, containing the two holiest sites in Christianity
Ahmed I
14th Sultan of the Ottoman Empire (1603–1617)
Robert Schuman
Luxembourgish-born German-French statesman and Venerable (1886-1963)

Baekdu Mountain
volcano on the border between North Korea and China
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Dracula
Dracula is an 1897 Gothic horror novel by Irish author Bram Stoker. The narrative is related through letters, diary entries, and newspaper articles. It has no single protagonist and opens with English solicitor Jonathan Harker taking a business trip to stay at the castle of a Transylvanian nobleman, Count Dracula. Revealing his true nature as a vampire, Dracula moves to England and plagues the seaside town of Whitby. Harker joins a group led by Abraham Van Helsing who hunt and kill the Count.
Clement VI
Pope of the Catholic Church and the fourth Avignon Pope (1342–1352)
Katyn massacre
Soviet mass murder of ca. 22,000 Poles in several parts of European Russia, including in the Katyn forest, which became a pars pro toto name for the whole massacre
Brownian motion
the random motion of particles suspended in a fluid resulting from their collision with the quick atoms or molecules in the gas or liquid

Nanjing Massacre
The Nanjing Massacre or the Rape of Nanjing was the mass rape and murder of Chinese civilians, noncombatants, and prisoners of war by the Imperial Japanese Army in Nanjing, the capital of the Republic of China. It took place immediately after the Battle of Nanjing and retreat of the National Revolutionary Army during the Second Sino-Japanese War.
Icelanders
Icelanders () are an ethnic group and nation who are native to the island country of Iceland. They speak Icelandic, a North Germanic language.
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Abdülaziz
Abdulaziz (; ; 8 February 18304 June 1876) was the sultan of the Ottoman Empire from 25 June 1861 to 30 May 1876, when he was overthrown in a government coup. He was a son of Sultan Mahmud II and succeeded his brother Abdulmejid I in 1861.

pigment
thumb|upright=1.35|Pigments for sale at a market stall in Goa, [[India]]
A pigment is a chemical compound that gives a substance or organism color, or is used by humans to add or alter color or change visual appearance. Pigments are nearly or completely insoluble and chemically unreactive in water or another medium; in contrast, dyes are colored substances which are soluble or go into solution at some stage in their use. Dyes are often organic compounds whereas pigments are often inorganic. Pigments of prehistoric and historic value include ochre, charcoal, and lapis lazuli. Biological pigment
The Song of Roland
medieval epic work
Ellora Caves
ancient cave temples of Hinduism, Buddhism and Jainism in Maharashtra, India

Preston
city and the administrative centre of Lancashire, England

Lancaster
county town of Lancashire, England
space race
competition to explore space between USA and USSR

opal
thumb|alt=A map of the world displaying the countries where opal is most commonly found; Australia, Ethiopia, Brazil, Mexico and the United States of America are highlighted.|Main opal producing countries
Twenty Thousand Leagues Under the Sea
1869/1870 novel by Jules Verne
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Methodism
Methodism, also called the Methodist movement, is a Protestant Christian tradition whose origins, and practice derive from the life and teachings of John Wesley. George Whitefield and John's brother Charles Wesley were also significant early leaders in the movement. They were named Methodists for "the methodical way in which they carried out their Christian faith". Methodism originated as a revival movement within Anglicanism with roots in the Church of England in the 18th century and became a separate denomination after Wesley's death. The movement spread throughout the British Empire, the Un
Universal Postal Union
specialized agency of the United Nations focused on cooperation within the postal sector
Ahmed III
23th Sultan of Ottoman Empire (1703–1730)
child labour
exploitation of children through any form of work
Guru Granth Sahib
The primary holy scripture of Sikhism
flag of Thailand
national flag of the Kingdom of Thailand
Qutb Minar
minaret in the Mehrauli area of Delhi, India
Leopold II, Holy Roman Emperor
Holy Roman Emperor from 1790 to 1792
history of Poland
account of past events in Poland since 966
Royal Navy
maritime service branch of the British Armed Forces