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George Washington (February 22, 1732 – December 14, 1799) was one of the Founding Fathers of the United States, serving as the commander-in-chief of the Continental Army during the American Revolutionary War. He also presided over the convention that drafted the Constitution, which replaced the Articles of Confederation. The Constitution established the position of President of the republic, which Washington was the first to hold.

Washington was elected President as the unanimous choice of the 69 electors in 1788, and he served two terms in office. He oversaw the creation of a strong, well-financed national government that maintained neutrality in the wars raging in Europe, suppressed rebellion, and won acceptance among Americans of all types.

His leadership style established many forms and rituals of government that have been used since, such as using a cabinet system and delivering an inaugural address. Further, the peaceful transition from his presidency to the presidency of John Adams established a tradition that continues into the 21st century. Historically, Washington has been widely regarded as the "father of his country".

Washington was born into the provincial gentry of Colonial Virginia; his wealthy planter family owned tobacco plantations and slaves. After both his father and older brother died when he was young, Washington became personally and professionally attached to the powerful William Fairfax, who promoted his career as a surveyor and soldier. Washington quickly became a senior officer in the colonial forces during the first stages of the French and Indian War.

Chosen by the Second Continental Congress in 1775 to be commander-in-chief of the Continental Army in the American Revolution, Washington managed to force the British out of Boston in 1776, but was defeated and almost captured later that year when he lost New York City. After crossing the Delaware River in the dead of winter, he defeated the British in two battles, retook New Jersey and restored momentum to the Patriot cause. Because of his strategy, Revolutionary forces captured two major British armies at Saratoga in 1777 and Yorktown in 1781.

Historians laud Washington for his selection and supervision of his generals, encouragement of morale and ability to hold together the army, coordination with the state governors and state militia units, relations with Congress and attention to supplies, logistics, and training. In battle, however, Washington was repeatedly outmaneuvered by British generals with larger armies. After victory had been finalized in 1783, Washington resigned as Commander-in-chief rather than seize power, proving his opposition to dictatorship and his commitment to American republicanism.

Dissatisfied with the weaknesses of Articles of Confederation, in 1787 Washington presided over the Constitutional Convention that drafted the United States Constitution. Elected unanimously as the first President of the United States in 1789, he attempted to bring rival factions together to unify the nation. He supported Alexander Hamilton's programs to pay off all state and national debt, to implement an effective tax system and to create a national bank (despite opposition from Thomas Jefferson).

Washington proclaimed the United States neutral in the wars raging in Europe after 1793. He avoided war with Great Britain and guaranteed a decade of peace and profitable trade by securing the Jay Treaty in 1795, despite intense opposition from the Jeffersonians. Although never officially joining the Federalist Party, he supported its programs.

Washington's "Farewell Address" was an influential primer on republican virtue and a warning against partisanship, sectionalism, and involvement in foreign wars. He retired from the presidency in 1797 and returned to his home, Mount Vernon, and his domestic life where he managed a variety of enterprises. He freed all his slaves by his final will.

Washington had a vision of a great and powerful nation that would be built on republican lines using federal power. He sought to use the national government to preserve liberty, improve infrastructure, open the western lands, promote commerce, found a permanent capital, reduce regional tensions and promote a spirit of American nationalism.

At his death, Washington was hailed as "first in war, first in peace, and first in the hearts of his countrymen". The Federalists made him the symbol of their party but for many years, the Jeffersonians continued to distrust his influence and delayed building the Washington Monument. As the leader of the first successful revolution against a colonial empire in world history, Washington became an international icon for liberation and nationalism, especially in France and Latin America. He is consistently ranked among the top three presidents of the United States, according to polls of both scholars and the general public.

Source: Wikipedia

Mustafa Kemal Atatürk (pronounced; 19 May 1881 (Conventional) – 10 November 1938) was an Ottoman and Turkish army officer, revolutionary statesman, writer, and the first President of Turkey. He is credited with being the founder of the Republic of Turkey. His surname, Atatürk (meaning "Father of the Turks"), was granted to him (and forbidden to any other person) in 1934 by the Turkish parliament.

Atatürk was a military officer during World War I.Following the defeat of the Ottoman Empire in World War I, he led the Turkish national movement in the Turkish War of Independence. Having established a provisional government in Ankara, he defeated the forces sent by the Allies. His military campaigns gained Turkey independence.

Atatürk then embarked upon a program of political, economic, and cultural reforms, seeking to transform the former Ottoman Empire into a modern, westernized and secular nation-state. Under his leadership, thousands of new schools were built, primary education was made free and compulsory, while the burden of taxation on peasants was reduced.The principles of Atatürk's reforms, upon which modern Turkey was established, are referred to as Kemalism.

Early years
Following graduation, Mustafa Kemal was assigned to the Fifth Army based in Damascus as a Staff Captainin the company of Ali Fuat (Cebesoy) and Lütfi Müfit . He joined a small secret revolutionary society of reformist officers led by a merchant Mustafa Elvan (Cantekin) called Vatan ve Hürriyet ("Motherland and Liberty"). On 20 June 1907, he was promoted to the rank of Senior Captain (Kolağası) and on 13 October 1907, assigned to the headquarters of the Third Army in Manastır.

He joined the Committee of Union and Progress, with membership number 322, although in later years he became known for his opposition to, and frequent criticism of, the policies pursued by the CUP leadership. On 22 June 1908, he was appointed the Inspector of the Ottoman Railways in Eastern Rumelia (Doğu Rumeli Bölgesi Demiryolları Müfettişi).In July 1908, he played a role in the Young Turk Revolution which seized power from Sultan Abdülhamid II and restored the constitutional monarchy.

In 1910 he was called to the Ottoman provinces in Albania.At that time Isa Boletini was leading Albanian uprisings in Kosovo and there were revolts in Albania.In 1910 he met with Eqerem Vlora. Later, in the autumn of 1910, he was among the Ottoman military observers who attended the Picardie army manoeuvres in France.In early 1911, he worked at the Ministry of War (Harbiye Nezareti) headquarters in Istanbul for a short time.

Italo-Turkish War (1911–1912)
Later in 1911, he was assigned to the Ottoman Tripolitania Vilayet (present-day Libya) to fight in the Italo-Turkish War, mainly in the areas near Benghazi, Derna and Tobruk.

A massive Italian amphibious assault force of 150,000 troops had to be countered by 20,000 Bedouins and 8,000 Turks (a short time before Italy declared war, a large portion of the Ottoman troops in Libya were sent to the Ottoman province of Yemen in order to put down the rebellion there, so the Ottoman government was caught with inadequate resources to counter the Italians in Libya; and the British government, which militarily controlled the de jure Ottoman provinces of Egypt and Sudan since the Urabi Revolt in 1882, didn't allow the Ottoman government to send additional Ottoman troops to Libya through Egypt; causing the Ottoman soldiers like Mustafa Kemal to go to Libya either dressed as Arabs (risking imprisonment if noticed by the British authorities in Egypt), or through very few available ferries (the Italians, who had superior naval forces, effectively controlled the sea routes to Tripoli).

However, despite all the hardships, Mustafa Kemal's forces in Libya managed to successfully repel the Italians in a number of occasions, such as the Battle of Tobruk on 22 December 1911.

During the Battle of Derna on 16–17 January 1912, while Mustafa Kemal was assaulting the Italian-controlled fortress of Kasr-ı Harun, two Italian planes dropped bombs on the Ottoman forces and a piece of limestone from a damaged building's rubble entered Mustafa Kemal's left eye; which caused a permanent damage on his left eye's tissue, but not a total loss of sight. After receiving medical treatment for nearly a month (he attempted to leave the Red Crescent's health facilities early after only two weeks, but when his eye's situation worsened, he had to return and resume the treatment) on 6 March 1912 Mustafa Kemal became the Commander of the Ottoman forces in Derna.

He managed to defend and retain the city and its surrounding region until the end of the Italo-Turkish War on 18 October 1912. Mustafa Kemal, Enver Bey, Fethi Bey and the other Ottoman military commanders in Libya had to return to Ottoman Europe following the outbreak of the Balkan Wars on 8 October 1912, due to which the Ottoman government agreed to surrender the provinces of Tripolitania, Fezzan and Cyrenaica (present-day Libya) to the Kingdom of Italy with the Treaty of Ouchy (First Treaty of Lausanne) signed ten days later, on 18 October.

Source: Wikipedia

Greek mythology are myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices.

They were a part of religion in ancient Greece and are part of religion in modern Greece and around the world as Hellenismos. Modern scholars refer to, and study, the myths in an attempt to throw light on the religious and political institutions of Ancient Greece, its civilization, and to gain understanding of the nature of myth-making itself.

Greek mythology is embodied, explicitly, in a large collection of narratives, and implicitly in Greek representational arts, such as vase-paintings and votive gifts. Greek myth attempts to explain the origins of the world, and details the lives and adventures of a wide variety of gods, goddesses, heroes, heroines, and mythological creatures. These accounts initially were disseminated in an oral-poetic tradition; today the Greek myths are known primarily from Greek literature.

The oldest known Greek literary sources, Homer's epic poems Iliad and Odyssey, focus on events surrounding the Trojan War. Two poems by Homer's near contemporary Hesiod, the Theogony and the Works and Days, contain accounts of the genesis of the world, the succession of divine rulers, the succession of human ages, the origin of human woes, and the origin of sacrificial practices.

Myths also are preserved in the Homeric Hymns, in fragments of epic poems of the Epic Cycle, in lyric poems, in the works of the tragedians of the fifth century BC, in writings of scholars and poets of the Hellenistic Age and in texts from the time of the Roman Empire by writers such as Plutarch and Pausanias.

Archaeological findings provide a principal source of detail about Greek mythology, with gods and heroes featured prominently in the decoration of many artifacts. Geometric designs on pottery of the eighth century BC depict scenes from the Trojan cycle as well as the adventures of Heracles.

In the succeeding Archaic, Classical, and Hellenistic periods, Homeric and various other mythological scenes appear, supplementing the existing literary evidence.Greek mythology has had an extensive influence on the culture, arts, and literature of Western civilization and remains part of Western heritage and language. Poets and artists from ancient times to the present have derived inspiration from Greek mythology and have discovered contemporary significance and relevance in the themes.

Source : Wikipedia

Hugh & Colleen Ganzter watched entranced as the raths of Lord Jagannath, Subhadra and Balabhadra began their annual journey in Puri. On a humid monsoon day, you can experience Puri's epiphany. So did a million other people.

They streamed down side streets and lanes and little winding alleys, poured into the broad Grand Road till it became a flowing river of humanity. And still more surged in, packed tighter and tighter till all we could see from our grandstand in the terrace of the palace was a sea of heads streaked with snaking currents of saffron, red and white as sects and cults merged with flood of devotees.

In the morning the frisson of festivity had been electric. The huge raths may have been shifted to the far end of Grand Road where zestful crowds clanged cymbals, thudded drums, danced and sang. A street-side langar got ready to serve steaming poori-bhaji to eager pilgrims. After breakfast, the police cleared a path for hurrying heralds lofting standards and banners, stopped at the gate of the palace.

The Gajapati Maharaja, dressed in white robes with a plumed and jewelled turban, and the sash and cummerbund of office, emerged accompanied by the head priest. He stepped into a silver palanquin as his Ganga dynasty ancestors had done ever since they had built the great temple by the shore of the Bay of Bengal a thousand years ago.

The flags and standards tracked his passage through the jubilant crowd. Then, using a golden broom, he carefully and ceremonially swept the forecourt of the huge raths, signalling the start of the divine trio's annual yatra from their temple on the second day of the shukla pakshya (waxing moon) in the month of Ashadh, to the Gundicha temple, at the end of the Grand Road.

A red fire tanker may spray a plume of water over the crowd as pilgrims danced in ecstatic devotion. Slowly, ponderously, the black and red chariot of Subhadra rolled into view. It was crammed with saffron-clad servitors clanging gongs, waving cheerily. The chariot moved on, the crowd flowed in behind it. Cameras clicked and flared around.

Two young pandas sat astride the white, wooden, horses. Worshippers on our terrace joined their hands and bowed deeply in obeisance till this, the last and most powerful ratha, had passed. The three chariots began to shrink with distance as they drew closer to Gundicha temple where the deities would rest for eight days before making the return journey to the main temple.

The great cacophony of celebration began to subside as the crowds dispersed in the soft light of sunset, laughing and clapping, charged by their twelve-hour close encounter with their gods. Even we felt unusually vitalized by it all.

Source: The Indian Times

Jalal-ud-Din Muhammad Akbar , also known as Shahanshah Akbar-e-Azam or Akbar the Great (15 October 1542  – 27 October 1605), was the third Mughal Emperor.

He was of Timurid descent; the son of Emperor Humayun, and the grandson of the Mughal Emperor Zaheeruddin Muhammad Babur, the ruler who founded the Mughal dynasty in India. At the end of his reign in 1605 the Mughal empire covered most of northern and central India.

He is most appreciated for having a liberal outlook on all faiths and beliefs and during his era, culture and art reached a zenith as compared to his predecessors.

Akbar was 13 years old when he ascended the Mughal throne in Delhi (February 1556), following the death of his father Humayun. During his reign, he eliminated military threats from the powerful Pashtun descendants of Sher Shah Suri, and at the Second Battle of Panipat he decisively defeated the newly self-declared Hindu king Hemu.

It took him nearly two more decades to consolidate his power and bring all the parts of northern and central India into his direct realm. He influenced the whole of the Indian Subcontinent as he ruled a greater part of it as an emperor. As an emperor, Akbar solidified his rule by pursuing diplomacy with the powerful Hindu Rajput caste, and by marrying a Rajput princess.

Akbar's reign significantly influenced art and culture in the country. He was a great patron of art and architecture He took a great interest in painting, and had the walls of his palaces adorned with murals.

Besides encouraging the development of the Mughal school, he also patronised the European style of painting. He was fond of literature, and had several Sanskrit works translated into Persian and Persian scriptures translated in Sanskrit apart from getting many Persian works illustrated by painters from his court.

During the early years of his reign, he showed intolerant attitude towards Hindus and other religions, but later exercised tolerance towards non-Islamic faiths by rolling back some of the strict sharia laws.His administration included numerous Hindu landlords, courtiers and military generals.

He began a series of religious debates where Muslim scholars would debate religious matters with Hindus, Jains, Zoroastrians and Portuguese Roman Catholic Jesuits. He treated these religious leaders with great consideration, irrespective of their faith, and revered them.

He not only granted lands and money for the mosques but the list of the recipients included a huge number Hindu temples in north and central India, Christian churches in Goa.

Source: Wikipedia

The attack on Pearl Harbor (called Hawaii Operation or Operation AI by the Japanese Imperial General Headquarters (Operation Z in planning) and the Battle of Pearl Harbor) was a surprise military strike conducted by the Imperial Japanese Navy against the United States naval base at Pearl Harbor, Hawaii, on the morning of December 7, 1941 (December 8 in Japan).

The attack was intended as a preventive action in order to keep the U.S. Pacific Fleet from interfering with military actions the Empire of Japan was planning in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States.

The base was attacked by 353 Japanese fighters, bombers and torpedo planes in two waves, launched from six aircraft carriers.All eight U.S. Navy battleships were damaged, with four being sunk. Of these eight damaged, two were raised, and with four repaired, six battleships returned to service later in the war.

The Japanese also sank or damaged three cruisers, three destroyers, an anti-aircraft training ship,and one minelayer. 188 U.S. aircraft were destroyed; 2,402 Americans were killed and 1,282 wounded.

Important base installations such as the power station, shipyard, maintenance, and fuel and torpedo storage facilities, as well as the submarine piers and headquarters building (also home of the intelligence section) were not attacked. Japanese losses were light: 29 aircraft and five midget submarines lost, and 65 servicemen killed or wounded. One Japanese sailor was captured.

The attack came as a profound shock to the American people and led directly to the American entry into World War II in both the Pacific and European theaters.

The following day (December 8), the United States declared war on Japan. Domestic support for non-interventionism, which had been strong,disappeared. Clandestine support of Britain (for example the Neutrality Patrol) was replaced by active alliance. Subsequent operations by the U.S. prompted Germany and Italy to declare war on the U.S. on December 11, which was reciprocated by the U.S. the same day.

There were numerous historical precedents for unannounced military action by Japan. However, the lack of any formal warning, particularly while negotiations were still apparently ongoing, led President Franklin D. Roosevelt to proclaim December 7, 1941, "a date which will live in infamy".

Source: Wikipedia

Christmas (Old English: Crīstesmæsse, meaning "Christ's Mass") is an annual commemoration of the birth of Jesus Christ and a widely observed holiday, celebrated generally on December 25 by millions of people around the world.

A feast central to the Christian liturgical year, it closes the Advent season and initiates the twelve days of Christmastide.Christmas is a civil holiday in many of the world's nations,is celebrated by an increasing number of non-Christians,and is an integral part of the Christmas and holiday season.

The precise year of Jesus' birth, which some historians place between 7 and 2 BC, is unknown. His birth is mentioned in two of the four canonical gospels. By the early-to-mid 4th century, the Western Christian Church had placed Christmas on December 25, a date later adopted in the East.

The date of Christmas may have initially been chosen to correspond with the day exactly nine months after early Christians believed Jesus to have been conceived, as well as the date of celebration of the southern solstice (i.e., the Roman winter solstice), with a sun connection being possible because Christians consider Jesus to be the "Sun of righteousness" prophesied in Malachi 4:2.

The original date of the celebration in Eastern Christianity was January 6, in connection with Epiphany, and that is still the date of the celebration for the Armenian Apostolic Church and in Armenia, where it is a public holiday. As of 2012, there is a difference of 13 days between the modern Gregorian calendar and the older Julian calendar.

Those who continue to use the Julian calendar or its equivalents thus celebrate December 25 and January 6 on what for the majority of the world is January 7 and January 19. For this reason, Ethiopia, Russia, Ukraine, Serbia, the Republic of Macedonia, and the Republic of Moldova celebrate Christmas on what in the Gregorian calendar is January 7; the Church of Greece and all Greek Orthodox Churches celebrate Christmas on December 25.

The popular celebratory customs associated in various countries with Christmas have a mix of pre-Christian, Christian, and secular themes and origins.

Popular modern customs of the holiday include gift giving, Christmas music and caroling, an exchange of Christmas cards, church celebrations, a special meal, and the display of various Christmas decorations, including Christmas trees, Christmas lights, nativity scenes, garlands, wreaths, mistletoe, and holly.

In addition, several closely related and often interchangeable figures, known as Santa Claus, Father Christmas, Saint Nicholas, and Christkind, are associated with bringing gifts to children during the Christmas season and have their own body of traditions and lore.

Because gift-giving and many other aspects of the Christmas festival involve heightened economic activity among both Christians and non-Christians, the holiday has become a significant event and a key sales period for retailers and businesses. The economic impact of Christmas is a factor that has grown steadily over the past few centuries in many regions of the world.

Commemorating Jesus' birth
Christians celebrate the birth of Jesus to the Virgin Mary as a fulfillment of the Old Testament's Messianic prophecy. The Bible contains two accounts which describe the events surrounding Jesus' birth. Depending on one's perspective, these accounts either differ from each other or tell two versions of the same story.

These biblical accounts are found in the Gospel of Matthew, namely Matthew 1:18, and the Gospel of Luke, specifically Luke 1:26 and 2:40. According to these accounts, Jesus was born to Mary, assisted by her husband Joseph, in the city of Bethlehem.

On Christmas Day, the Christ Candle in the center of the Advent wreath is traditionally lit in many church services.

According to popular tradition, the birth took place in a stable, surrounded by farm animals. A manger (that is, a feeding trough) is mentioned in Luke 2:7, where it states Mary "wrapped him in swaddling clothes and laid him in a manger, because there was no room for them in the inn" (KJV); and "She wrapped him in cloths and placed him in a manger, because there was no guest room available for them" (NIV). Shepherds from the fields surrounding Bethlehem were told of the birth by an angel, and were the first to see the child.

Popular tradition also holds that three kings or wise men (named Melchior, Caspar, and Balthazar) visited the infant Jesus in the manger, though this does not strictly follow the Biblical account.

The Gospel of Matthew instead describes a visit by an unspecified number of magi, or astrologers, sometime after Jesus was born while the family was living in a house (Matthew 2:11), who brought gifts of gold, frankincense, and myrrh to the young child Jesus.

The visitors were said to be following a mysterious star, commonly known as the Star of Bethlehem, believing it to announce the birth of a king of the Jews. The commemoration of this visit, the Feast of Epiphany celebrated on January 6, is the formal end of the Christmas season in some churches.

Christians celebrate Christmas in various ways. In addition to this day being one of the most important and popular for the attendance of church services, there are other devotions and popular traditions. In some Christian denominations, children re-enact the events of the Nativity with animals to portray the event with more realism or sing carols that reference the event.

Some Christians also display a small re-creation of the Nativity, known as a Nativity scene or crèche, in their homes, using figurines to portray the key characters of the event. Prior to Christmas Day, the Eastern Orthodox Church practices the 40-day Nativity Fast in anticipation of the birth of Jesus, while much of Western Christianity celebrates four weeks of Advent.

The final preparations for Christmas are made on Christmas Eve, and many families' major observation of Christmas actually falls in the evening of this day.

A long artistic tradition has grown of producing painted depictions of the nativity in art. Nativity scenes are traditionally set in a stable with livestock and include Mary, Joseph, the infant Jesus in the manger, the three wise men, the shepherds and their sheep, the angels, and the Star of Bethlehem.

Source: Wikipedia

A computer is a general purpose device that can be programmed to carry out a finite set of arithmetic or logical operations. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem.

Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU) and some form of memory. The processing element carries out arithmetic and logic operations, and a sequencing and control unit that can change the order of operations based on stored information. Peripheral devices allow information to be retrieved from an external source, and the result of operations saved and retrieved.

The first electronic digital computers were developed between 1940 and 1945 in the United Kingdom and United States. Originally they were the size of a large room, consuming as much power as several hundred modern personal computers (PCs). In this era mechanical analog computers were used for military applications.

Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space. Simple computers are small enough to fit into mobile devices, and mobile computers can be powered by small batteries. Personal computers in their various forms are icons of the Information Age and are what most people think of as "computers". However, the embedded computers found in many devices from mp3 players to fighter aircraft and from toys to industrial robots are the most numerous.

History of computing
The first use of the word "computer" was recorded in 1613, referring to a person who carried out calculations, or computations, and the word continued with the same meaning until the middle of the 20th century. From the end of the 19th century the word began to take on its more familiar meaning, a machine that carries out computations.

Limited-function early computersThe history of the modern computer begins with two separate technologies, automated calculation and programmability, but no single device can be identified as the earliest computer, partly because of the inconsistent application of that term.

A few devices are worth mentioning though, like some mechanical aids to computing, which were very successful and survived for centuries until the advent of the electronic calculator, like the Sumerian abacus, designed around 2500 BC of which a descendant won a speed competition against a modern desk calculating machine in Japan in 1946, the slide rules, invented in the 1620s, which were carried on five Apollo space missions, including to the moon and arguably the astrolabe and the Antikythera mechanism, an ancient astronomical computer built by the Greeks around 80 BC.

The Greek mathematician Hero of Alexandria (c. 10–70 AD) built a mechanical theater which performed a play lasting 10 minutes and was operated by a complex system of ropes and drums that might be considered to be a means of deciding which parts of the mechanism performed which actions and when.This is the essence of programmability.

Around the end of the 10th century, the French monk Gerbert d'Aurillac brought back from Spain the drawings of a machine invented by the Moors that answered either Yes or No to the questions it was asked.Again in the 13th century, the monks Albertus Magnus and Roger Bacon built talking androids without any further development (Albertus Magnus complained that he had wasted forty years of his life when Thomas Aquinas, terrified by his machine, destroyed it).

In 1642, the Renaissance saw the invention of the mechanical calculator, a device that could perform all four arithmetic operations without relying on human intelligence. The mechanical calculator was at the root of the development of computers in two separate ways. Initially, it was in trying to develop more powerful and more flexible calculators that the computer was first theorized by Charles Babbage and then developed. Secondly, development of a low-cost electronic calculator, successor to the mechanical calculator, resulted in the development by Intel of the first commercially available microprocessor integrated circuit.

First general-purpose computers
In 1801, Joseph Marie Jacquard made an improvement to the textile loom by introducing a series of punched paper cards as a template which allowed his loom to weave intricate patterns automatically. The resulting Jacquard loom was an important step in the development of computers because the use of punched cards to define woven patterns can be viewed as an early, albeit limited, form of programmability.

It was the fusion of automatic calculation with programmability that produced the first recognizable computers. In 1837, Charles Babbage was the first to conceptualize and design a fully programmable mechanical computer, his analytical engine.

Limited finances and Babbage's inability to resist tinkering with the design meant that the device was never completed—nevertheless his son, Henry Babbage, completed a simplified version of the analytical engine's computing unit (the mill) in 1888. He gave a successful demonstration of its use in computing tables in 1906. This machine was given to the Science museum in South Kensington in 1910.

In the late 1880s, Herman Hollerith invented the recording of data on a machine-readable medium. Earlier uses of machine-readable media had been for control, not data. "After some initial trials with paper tape, he settled on punched cards ..." To process these punched cards he invented the tabulator, and the keypunch machines.

These three inventions were the foundation of the modern information processing industry. Large-scale automated data processing of punched cards was performed for the 1890 United States Census by Hollerith's company, which later became the core of IBM. By the end of the 19th century a number of ideas and technologies, that would later prove useful in the realization of practical computers, had begun to appear: Boolean algebra, the vacuum tube (thermionic valve), punched cards and tape, and the teleprinter.

During the first half of the 20th century, many scientific computing needs were met by increasingly sophisticated analog computers, which used a direct mechanical or electrical model of the problem as a basis for computation. However, these were not programmable and generally lacked the versatility and accuracy of modern digital computers.

Alan Turing is widely regarded as the father of modern computer science. In 1936 Turing provided an influential formalisation of the concept of the algorithm and computation with the Turing machine, providing a blueprint for the electronic digital computer. Of his role in the creation of the modern computer, Time magazine in naming Turing one of the 100 most influential people of the 20th century, states: "The fact remains that everyone who taps at a keyboard, opening a spreadsheet or a word-processing program, is working on an incarnation of a Turing machine".

The Atanasoff–Berry Computer (ABC) was the world's first electronic digital computer, albeit not programmable. Atanasoff is considered to be one of the fathers of the computer.Conceived in 1937 by Iowa State College physics professor John Atanasoff, and built with the assistance of graduate student Clifford Berry, the machine was not programmable, being designed only to solve systems of linear equations. The computer did employ parallel computation. A 1973 court ruling in a patent dispute found that the patent for the 1946 ENIAC computer derived from the Atanasoff–Berry Computer.

The first program-controlled computer was invented by Konrad Zuse, who built the Z3, an electromechanical computing machine, in 1941.The first programmable electronic computer was the Colossus, built in 1943 by Tommy Flowers.

George Stibitz is internationally recognized as a father of the modern digital computer. While working at Bell Labs in November 1937, Stibitz invented and built a relay-based calculator he dubbed the "Model K" (for "kitchen table", on which he had assembled it), which was the first to use binary circuits to perform an arithmetic operation.

Later models added greater sophistication including complex arithmetic and programmability. A succession of steadily more powerful and flexible computing devices were constructed in the 1930s and 1940s, gradually adding the key features that are seen in modern computers. The use of digital electronics (largely invented by Claude Shannon in 1937) and more flexible programmability were vitally important steps, but defining one point along this road as "the first digital electronic computer" is difficult.Shannon 1940 Notable achievements include:

Konrad Zuse's electromechanical "Z machines". The Z3 (1941) was the first working machine featuring binary arithmetic, including floating point arithmetic and a measure of programmability. In 1998 the Z3 was proved to be Turing complete, therefore being the world's first operational computer.

The non-programmable Atanasoff–Berry Computer (commenced in 1937, completed in 1941) which used vacuum tube based computation, binary numbers, and regenerative capacitor memory. The use of regenerative memory allowed it to be much more compact than its peers (being approximately the size of a large desk or workbench), since intermediate results could be stored and then fed back into the same set of computation elements.

The secret British Colossus computers (1943), which had limited programmability but demonstrated that a device using thousands of tubes could be reasonably reliable and electronically reprogrammable. It was used for breaking German wartime codes. The Harvard Mark I (1944), a large-scale electromechanical computer with limited programmability.

The U.S. Army's Ballistic Research Laboratory ENIAC (1946), which used decimal arithmetic and is sometimes called the first general purpose electronic computer (since Konrad Zuse's Z3 of 1941 used electromagnets instead of electronics). Initially, however, ENIAC had an inflexible architecture which essentially required rewiring to change its programming.

Source: Wikipedia