The IBM Selective Sequence Electronic Calculator ( SSEC ) was an electromechanical computer built by IBM . Its design was started in late 1944 and it operated from January 1948 to August 1952. It had many of the features of a stored-program computer , and was the first operational machine able to treat its instructions as data, but it was not fully electronic. Although the SSEC proved useful for several high-profile applications, it soon became obsolete. As the last large electromechanical computer ever built, its greatest success was the publicity it provided for IBM.
81-631: SSEC can refer to: IBM SSEC , an electromechanical calculator in the 1940s Sarnia Sports & Entertainment Centre , Ontario, Canada Secondary Schools Examinations Council , British body 1917-1963 Shri Shankaracharya Engineering College , an engineering college in Chhattisgarh, India Society for the Study of Early Christianity at Macquarie University in Sydney, Australia South Seas Evangelical Church , in
162-612: A decade between Irish immigrants and Black people for work. Rioters burned the Colored Orphan Asylum to the ground. At least 120 people were killed. Eleven Black men were lynched over five days, and the riots forced hundreds of Blacks to flee. The Black population in Manhattan fell below 10,000 by 1865. The White working class had established dominance. It was one of the worst incidents of civil unrest in American history . In 1886,
243-510: A part of the colony of New York . It became a center of slavery , with 42% of households enslaving Africans by 1730. Most were domestic slaves ; others were hired out as labor. Slavery became integrally tied to New York's economy through the labor of slaves throughout the port, and the banking and shipping industries trading with the American South . During construction in Foley Square in
324-510: A reputation as a despotic leader. He instituted regulations on liquor sales, attempted to assert control over the Dutch Reformed Church , and blocked other religious groups from establishing houses of worship. In 1664, unable to summon any significant resistance, Stuyvesant surrendered New Amsterdam to English troops, led by Colonel Richard Nicolls , without bloodshed. The terms of the surrender permitted Dutch residents to remain in
405-524: A result of Sandy, and the economic losses in New York City were estimated to be roughly $ 19 billion. The disaster spawned long-term efforts towards infrastructural projects to counter climate change and rising seas, with $ 15 billion in federal funding received through 2022 towards those resiliency efforts. In March 2020, the first case of COVID-19 in the city was confirmed. With its population density and its extensive exposure to global travelers,
486-476: A speech denying the request, which was paraphrased on the front page of the New York Daily News as "FORD TO CITY: DROP DEAD." The Municipal Assistance Corporation was formed and granted oversight authority over the city's finances. While a resurgence in the financial industry greatly improved the city's economic health in the 1980s, New York's crime rate continued to increase through that decade and into
567-441: A women's shoe store. The noisy SSEC was sometimes called Poppa by the viewing pedestrians. It was dedicated and first demonstrated to the public on January 27, 1948. A. Wayne Brooke served as the chief electronic engineer for the machine's operation starting in 1950. Herb Grosch , the second person with a Ph.D. hired by IBM, was one of its first programmers. Another early programmer was Edgar "Ted" Codd . Elizabeth "Betsy" Stewart
648-467: Is an established safe haven for global investors. As of 2023 , New York City is the most expensive city in the world for expatriates and has by a wide margin the highest U.S. city residential rents; and Fifth Avenue is the most expensive shopping street in the world. New York City is home by a significant margin to the highest number of billionaires , individuals of ultra-high net worth (greater than US$ 30 million), and millionaires of any city in
729-837: The Atlantic port to the agricultural markets and commodities of the North American interior via the Hudson River and the Great Lakes . Local politics became dominated by Tammany Hall , a political machine supported by Irish and German immigrants . In 1831, New York University was founded. Several prominent American literary figures lived in New York during the 1830s and 1840s, including William Cullen Bryant , Washington Irving , Herman Melville , Rufus Wilmot Griswold , John Keese , Nathaniel Parker Willis , and Edgar Allan Poe . Members of
810-876: The Crown , with as many as 10,000 escaped slaves crowded into the city during the British occupation, the largest such community on the continent. When the British forces evacuated New York at the close of the war in 1783, they transported thousands of freedmen for resettlement in Nova Scotia , England, and the Caribbean . The attempt at a peaceful solution to the war took place at the Conference House on Staten Island between American delegates, including Benjamin Franklin , and British general Lord Howe on September 11, 1776. Shortly after
891-794: The Ferranti Mark I was marketed in the UK as a commercial computer using Williams tube technology, followed by the UNIVAC I using delay-line memory in the US. These memory technologies allowed stored-program features to be more practical. The stored-program concept had been first widely published in 1945 in the First Draft of a Report on the EDVAC and became known as the Von Neumann architecture . The EDVAC (first working in 1949)
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#1732851495887972-699: The New York City Fire Department and 71 law enforcement officers. The area was rebuilt with a new World Trade Center , the National September 11 Memorial and Museum , and other new buildings and infrastructure, including the World Trade Center Transportation Hub , the city's third-largest hub. The new One World Trade Center is the tallest skyscraper in the Western Hemisphere and the seventh-tallest building in
1053-675: The Northeast megalopolis and the New York metropolitan area , the largest metropolitan area in the U.S. by both population and urban area . New York is a global center of finance and commerce , culture , technology , entertainment and media , academics and scientific output , the arts and fashion , and, as home to the headquarters of the United Nations , international diplomacy . With an estimated population in 2023 of 8,258,035 distributed over 300.46 square miles (778.2 km ),
1134-947: The Northwest Passage to the Orient for the Dutch East India Company . He sailed up what the Dutch called North River (now the Hudson River), named first by Hudson as the Mauritius after Maurice, Prince of Orange . Hudson claimed the region for the Dutch East India Company. In 1614, the area between Cape Cod and Delaware Bay was claimed by the Netherlands and called Nieuw-Nederland (' New Netherland '). The first non–Native American inhabitant of what became New York City
1215-617: The Statue of Liberty , a gift from France , was dedicated in New York Harbor. The statue welcomed 14 million immigrants as they came to the U.S. via Ellis Island by ship in the late 19th and early 20th centuries, and is a symbol of the United States and American ideals of liberty and peace. In 1898, the City of New York was formed with the consolidation of Brooklyn (until then a separate city),
1296-683: The Stonewall riots were a series of violent protests by members of the gay community against a police raid that took place in the early morning of June 28, 1969, at the Stonewall Inn in Greenwich Village . They are widely considered to be the single most important event leading to the gay liberation movement and the modern fight for LGBT rights . Wayne R. Dynes , author of the Encyclopedia of Homosexuality , wrote that drag queens were
1377-586: The steamship General Slocum caught fire in the East River , killing 1,021 people. In 1911, the Triangle Shirtwaist Factory fire , the city's worst industrial disaster, killed 146 garment workers and spurred the growth of the International Ladies' Garment Workers' Union and major improvements in factory safety standards. New York's non-White population was 36,620 in 1890. New York City
1458-535: The 1990s, the African Burying Ground was discovered; the cemetery included 10,000 to 20,000 graves of colonial-era Africans, some enslaved and some free. The 1735 trial and acquittal in Manhattan of John Peter Zenger , who had been accused of seditious libel after criticizing colonial governor William Cosby , helped to establish freedom of the press in North America . In 1754, Columbia University
1539-525: The 19th century, the city was transformed by both commercial and residential development relating to its status as a national and international trading center , as well as by European immigration, respectively. The city adopted the Commissioners' Plan of 1811 , which expanded the city street grid to encompass almost all of Manhattan. The 1825 completion of the Erie Canal through central New York connected
1620-671: The British occupation began, the Great Fire of New York destroyed nearly 500 buildings, about a quarter of the structures in the city, including Trinity Church . In January 1785, the assembly of the Congress of the Confederation made New York City the national capital. New York was the last capital of the U.S. under the Articles of Confederation and the first capital under the Constitution of
1701-518: The Bronx , and Staten Island . Anchored by Wall Street in the Financial District, Manhattan , New York City has been called both the world's premier financial and fintech center and the most economically powerful city in the world. As of 2022 , the New York metropolitan area is the largest metropolitan economy in the world , with a gross metropolitan product of over US$ 2.16 trillion. If
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#17328514958871782-558: The County of New York (which then included parts of the Bronx), the County of Richmond, and the western portion of the County of Queens. The opening of the New York City Subway in 1904, first built as separate private systems, helped bind the new city together. Throughout the first half of the 20th century, the city became a world center for industry, commerce, and communication. In 1904,
1863-585: The Dutch West India Company relinquished its monopoly over the fur trade, leading to growth in the production and trade of food, timber, tobacco, and slaves (particularly with the Dutch West Indies ). In 1647, Peter Stuyvesant began his tenure as the last Director-General of New Netherland. During his tenure, the population of New Netherland grew from 2,000 to 8,000. Stuyvesant has been credited with improving law and order; however, he earned
1944-529: The Dutch colonial Director-General Peter Minuit , as charged by the Dutch West India Company , purchased the island of Manhattan from the Canarsie , a small Lenape band, for "the value of 60 guilders " (about $ 900 in 2018). A frequently told but disproved legend claims that Manhattan was purchased for $ 24 worth of glass beads. Following the purchase, New Amsterdam grew slowly. To attract settlers,
2025-597: The Dutch instituted the patroon system in 1628, whereby wealthy Dutchmen ( patroons , or patrons) who brought 50 colonists to New Netherland would be awarded land, local political autonomy, and rights to participate in the lucrative fur trade. This program had little success. Since 1621, the Dutch West India Company had operated as a monopoly in New Netherland, on authority granted by the Dutch States General . In 1639–1640, in an effort to bolster economic growth,
2106-580: The Native Americans and epidemics brought on by contact with the Europeans caused sizeable population losses for the Lenape between 1660 and 1670. By 1700, the Lenape population had diminished to 200. New York experienced several yellow fever epidemics in the 18th century, losing ten percent of its population in 1702 alone. In the early 18th century, New York grew in importance as a trading port while as
2187-470: The New York metropolitan area were its own country , it would have the tenth-largest economy in the world . Despite having a 24/7 rapid transit system , New York also leads the world in urban automobile traffic congestion . The city is home to the world's two largest stock exchanges by market capitalization of their listed companies: the New York Stock Exchange and Nasdaq . New York City
2268-699: The Revolutionary War and escaped slaves, a significant free-Black population gradually developed in Manhattan. The New York Manumission Society worked for abolition and established the African Free School to educate Black children. It was not until 1827 that slavery was completely abolished in the state . Free Blacks struggled with discrimination and interracial abolitionist activism continued. New York City's population jumped from 123,706 in 1820 (10,886 of whom were Black and of which 518 were enslaved) to 312,710 by 1840 (16,358 of whom were Black). Also in
2349-624: The SSEC was General Electric . The SSEC was also used for calculations by the U.S. Atomic Energy Commission for the ANP project to power an airplane with a nuclear reactor. Robert D. Richtmyer of Los Alamos National Laboratory used the SSEC for some of the first large-scale applications of the Monte Carlo method . Llewellyn Thomas solved problems with stability of laminar flow , programmed by Donald A. Quarles Jr. and Phyllis K. Brown. In 1949, Cuthbert Hurd
2430-607: The SSEC was seen as a problem, and IBM soon licensed the Williams tube technology developed on the Manchester Baby at the Victoria University of Manchester . Subsequent computers would have electronic random access memory , and in fact the ability to execute instructions from processor registers was generally not adopted. The 77-bit wide programming word was also abandoned for fewer bits but much faster operation. By 1951
2511-607: The Solomon Islands Space Science and Engineering Center at the University of Wisconsin–Madison, USA SSE Composite Index , Shanghai Stock Exchange index Stepping Stone Educational Centre in Port Harcourt, Rivers State Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title SSEC . If an internal link led you here, you may wish to change
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2592-505: The Supplement to the AE 1968. Taken together, the corrections thus referenced modify practically every individual element of the lunar computations, and thus the space program appears to have been using lunar data generated by a modified and corrected derivative of the computational procedure pioneered using the SSEC, rather than the directly resulting tables themselves. The first paying customer of
2673-461: The United States . As the U.S. capital, New York City hosted the inauguration of the first President, George Washington , and the first Congress , at Federal Hall on Wall Street . Congress drafted the Bill of Rights there. The Supreme Court held its first organizational sessions in New York in 1790. In 1790, for the first time, New York City surpassed Philadelphia as the nation's largest city. At
2754-694: The area for France and named it Nouvelle Angoulême (New Angoulême ). A Spanish expedition, led by the Portuguese captain Estêvão Gomes sailing for Emperor Charles V , arrived in New York Harbor in January 1525 and charted the mouth of the Hudson River , which he named Río de San Antonio ('Saint Anthony's River'). In 1609, the English explorer Henry Hudson rediscovered New York Harbor while searching for
2835-539: The basic design was ready in December 1945. The February 1946 announcement of the fully electronic ENIAC energized the project. The new machine, called the IBM Selective Sequence Electronic Calculator (SSEC), was ready to be installed by August 1947. Watson called such machines calculators because computer then referred to humans employed to perform calculations and he wanted to convey
2916-493: The beginning of the 1990s. By the mid-1990s, crime rates started to drop dramatically due to revised police strategies, improving economic opportunities, gentrification , and new residents, both American transplants and new immigrants from Asia and Latin America. New York City's population exceeded 8 million for the first time in the 2000 United States census ; further records were set in 2010 , and 2020 U.S. censuses. Important new sectors, such as Silicon Alley , emerged in
2997-534: The business elite lobbied for the establishment of Central Park , which in 1857 became the first landscaped park in an American city. The Great Irish Famine brought a large influx of Irish immigrants, of whom more than 200,000 were living in New York by 1860, representing over a quarter of the city's population. Extensive immigration from the German provinces meant that Germans comprised another 25% of New York's population by 1860. Democratic Party candidates were consistently elected to local office, increasing
3078-510: The city from New Jersey. The East River—a tidal strait —flows from Long Island Sound and separates the Bronx and Manhattan from Long Island. The Harlem River , another tidal strait between the East and Hudson rivers, separates most of Manhattan from the Bronx. The Bronx River , which flows through the Bronx and Westchester County , is the only entirely freshwater river in the city. The city's land has been altered substantially by human intervention, with considerable land reclamation along
3159-425: The city is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles , the nation's second-most populous city. With more than 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York City is one of the world's most populous megacities . The city and its metropolitan area are
3240-439: The city rapidly replaced Wuhan , China as the global epicenter of the pandemic during the early phase, straining the city's healthcare infrastructure. Through March 2023, New York City recorded more than 80,000 deaths from COVID-19-related complications. New York City is situated in the northeastern United States , in southeastern New York State, approximately halfway between Washington, D.C. and Boston . Its location at
3321-447: The city's economy. The advent of Y2K was celebrated with fanfare in Times Square . New York City suffered the bulk of the economic damage and largest loss of human life in the aftermath of the September 11, 2001, attacks . Two of the four airliners hijacked that day were flown into the twin towers of the World Trade Center, resulting in the collapse of both buildings and the deaths of 2,753 people, including 343 first responders from
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3402-615: The city's ties to the South and its dominant party. In 1861, Mayor Fernando Wood called on the aldermen to declare independence from Albany and the United States after the South seceded, but his proposal was not acted on. Anger at new military conscription laws during the American Civil War (1861–1865), which spared wealthier men who could afford to hire a substitute, led to the Draft Riots of 1863 , whose most visible participants were ethnic Irish working class. The draft riots deteriorated into attacks on New York's elite, followed by attacks on Black New Yorkers after fierce competition for
3483-456: The colony and allowed for religious freedom. In 1667, during negotiations leading to the Treaty of Breda after the Second Anglo-Dutch War , the victorious Dutch decided to keep the nascent plantation colony of what is now Suriname , which they had gained from the English, and in return the English kept New Amsterdam. The settlement was promptly renamed "New York" after the Duke of York (the future King James II and VII). The duke gave part of
3564-442: The colony to proprietors George Carteret and John Berkeley . On August 24, 1673, during the Third Anglo-Dutch War , Anthony Colve of the Dutch navy seized New York at the behest of Cornelis Evertsen the Youngest and rechristened it "New Orange" after William III , the Prince of Orange . The Dutch soon returned the island to England under the Treaty of Westminster of November 1674. Several intertribal wars among
3645-417: The development of large housing tracts in eastern Queens and Nassau County , with Wall Street leading America's place as the world's dominant economic power. The United Nations headquarters was completed in 1952, solidifying New York's global geopolitical influence, and the rise of abstract expressionism in the city precipitated New York's displacement of Paris as the center of the art world. In 1969,
3726-406: The end of 1790, the national capital was moved to Philadelphia . During the 19th century, New York City's population grew from 60,000 to 3.43 million. Under New York State's gradual emancipation act of 1799, children of slave mothers were to be eventually liberated but to be held in indentured servitude until their mid-to-late twenties. Together with slaves freed by their masters after
3807-423: The end of 1948 a new IBM 604 multiplier was announced, which used newer tube technology that already made the bulky tubes of the SSEC obsolete. By May 1949 the Card-Programmed Electronic Calculator was announced, and shipped in September. It was effectively a much scaled-down version of the SSEC technology to allow customers to perform similar calculations. Even by the end of 1948, the limited electronic memory of
3888-422: The film Walk East on Beacon , which is based on a book by J. Edgar Hoover . It was widely covered positively by the press. The SSEC attracted both customers and new employees. Both Hurd and Backus were hired after seeing demonstrations of the facility. The 1946 ENIAC had more tubes than the SSEC and was faster in some operations, but was originally less flexible, needing to be rewired for each new problem. At
3969-404: The first stored-program computer . The first application of the SSEC was calculating the positions of the Moon and planets , known as an ephemeris . Each position of the Moon required about 11,000 additions, 9,000 multiplications, and 2,000 table look-ups, which took the SSEC about seven minutes. This application used the machine for about six months; by then other users were lined up to keep
4050-457: The founding of a Dutch fur trading settlement on Governors Island . In 1625, construction was started on a citadel and Fort Amsterdam , later called Nieuw Amsterdam (New Amsterdam), on present-day Manhattan Island. The colony of New Amsterdam extended from the southern tip of Manhattan to modern-day Wall Street , where a 12-foot (3.7 m) wooden stockade was built in 1653 to protect against Native American and English raids. In 1626,
4131-410: The ice (and its subsequent retreat) contributed to the separation of what is now Long Island and Staten Island. That action left bedrock at a relatively shallow depth, providing a solid foundation for most of Manhattan's skyscrapers. The Hudson River flows through the Hudson Valley into New York Bay . Between New York City and Troy, New York , the river is an estuary . The Hudson River separates
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#17328514958874212-434: The last American stronghold in Manhattan, causing George Washington and his forces to retreat across the Hudson River to New Jersey , pursued by British forces. After the battle, in which the Americans were defeated, the British made the city their military and political base of operations in North America. The city was a haven for Loyalist refugees and escaped slaves who joined the British lines for freedom promised by
4293-588: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=SSEC&oldid=1061939455 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages IBM SSEC During World War II, International Business Machines Corporation (IBM) funded and built an Automatic Sequence Controlled Calculator (ASCC) for Howard H. Aiken at Harvard University . The machine, formally dedicated in August 1944,
4374-423: The machine busy. It has sometimes been said that the SSEC produced the Moon-position tables that were later used for plotting the course of the 1969 Apollo flight to the Moon. Records closer to 1969 suggest, however, that while there was a relationship, it was most likely less immediate. Thus, Mulholland and Devine (1968), working at NASA Jet Propulsion Laboratory , reported that the JPL Ephemeris Tape System
4455-418: The message that IBM's machines were not designed to replace people. Rather they were designed to help people, by relieving them of drudgery. The SSEC was installed on three sides of a room on the ground floor of a building near IBM's headquarters at 590 Madison Avenue in New York City , behind a large window where it was visible to people passing by on the busy street. The space had formerly been occupied by
4536-419: The most populous urbanized area in the world in the early 1920s, overtaking London . The metropolitan area surpassed 10 million in the early 1930s, becoming the first megacity . The Great Depression saw the election of reformer Fiorello La Guardia as mayor and the fall of Tammany Hall after eighty years of political dominance. Returning World War II veterans created a post-war economic boom and
4617-437: The mouth of the Hudson River , which feeds into a naturally sheltered harbor and then into the Atlantic Ocean , has helped the city grow in significance as a trading port. Most of the city is built on the three islands of Long Island, Manhattan, and Staten Island. During the Wisconsin glaciation , 75,000 to 11,000 years ago, the New York City area was situated at the edge of a large ice sheet . The erosive forward movement of
4698-447: The new machine; the project budget of almost $ 1 million was an immense amount for the time. Francis "Frank" E. Hamilton (1898–1972) supervised the construction of both the ASCC and the SSEC. Robert Rex Seeber Jr. was also hired away from the Harvard group, and became known as the chief architect of the new machine. Modules were manufactured in IBM's facility at Endicott, New York , under Director of Engineering John McPherson after
4779-445: The only " transgender folks around" during the June 1969 Stonewall riots. The transgender community in New York City played a significant role in fighting for LGBT equality. In the 1970s, job losses due to industrial restructuring caused New York City to suffer from economic problems and rising crime rates. Growing fiscal deficits in 1975 led the city to appeal to the federal government for financial aid; President Gerald Ford gave
4860-446: The paper tape memory made programming the SSEC more like the calculators from the World War II era. For example, "loops" were usually literal loops of paper tape glued together. For each new program, tapes and card decks were literally "loaded" on the readers, and a plugboard changed in the printer to modify output formatting. For these reasons, the SSEC is usually classified as the last of the "programmable calculator" machines instead of
4941-422: The people who had programmed it could see how to get it running again”. ENIAC co-designer J. Presper Eckert (no relation to the IBM Eckert) called it "some big monstrosity over there that I don't think ever worked right". Seeber had carefully designed the SSEC to treat instructions as data, so they could be modified and stored under program control. IBM filed a patent based on the SSEC on January 19, 1949, which
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#17328514958875022-482: The premier gateway for legal immigration to the United States . As many as 800 languages are spoken in New York City, making it the most linguistically diverse city in the world. In 2021, the city was home to nearly 3.1 million residents born outside the U.S., the largest foreign-born population of any city in the world. New York City traces its origins to Fort Amsterdam and a trading post founded on Manhattan Island by Dutch colonists around 1624. The settlement
5103-414: The quoted 400,000 digit capacity was in the form of reels of punched paper tape. Addition took 285 microseconds and multiplication 20 milliseconds, making arithmetic operations much faster than the Harvard Mark I. Data that had to be retrieved quickly was held in electronic circuits; the remainder was stored in relays and as holes in three continuous card-stock tapes that filled another wall. A chain hoist
5184-415: The same Endicott team who developed the SSEC. New York City New York , often called New York City or NYC , is the most populous city in the United States , located at the southern tip of New York State on one of the world's largest natural harbors . The city comprises five boroughs , each coextensive with a respective county . The city is the geographical and demographic center of both
5265-404: The two side rows were used for sprockets. The familiar 80 columns of IBM punched card technology were recorded sideways as one column of the tape. Using well-tested technology, the SSEC's calculations were accurate and precise for its time, but one early programmer, John Backus , said "you had to be there the entire time the program was running, because it would stop every three minutes, and only
5346-415: The world by pinnacle height, with its spire reaching a symbolic 1,776 feet (541.3 m), a reference to the year of U.S. independence . The Occupy Wall Street protests in Zuccotti Park in the Financial District of Lower Manhattan began on September 17, 2011, receiving global attention and popularizing the Occupy movement against social and economic inequality worldwide. New York City
5427-409: The world. In 1664, New York was named in honor of the Duke of York (later King James II of England ). James's elder brother, King Charles II , appointed the Duke as proprietor of the former territory of New Netherland , including the city of New Amsterdam , when the Kingdom of England seized it from Dutch control. In the pre-Columbian era , the area of present-day New York City
5508-422: Was Juan Rodriguez , a merchant from Santo Domingo who arrived in Manhattan during the winter of 1613–14, trapping for pelts and trading with the local population as a representative of the Dutch colonists. A permanent European presence near New York Harbor was established in 1624, making New York the 12th-oldest continuously occupied European-established settlement in the continental United States , with
5589-440: Was heavily affected by Hurricane Sandy in late October 2012. Sandy's impacts included flooding that led to the days-long shutdown of the subway system and flooding of all East River subway tunnels and of all road tunnels entering Manhattan except the Lincoln Tunnel . The New York Stock Exchange closed for two days due to weather for the first time since the Great Blizzard of 1888 . At least 43 people died in New York City as
5670-488: Was "used for virtually all computations of spacecraft trajectories in the US space program", and that it had, as its current lunar ephemeris, an evaluation of the Improved Lunar Ephemeris incorporating a number of corrections: sources are named as 'The Improved Lunar Ephemeris' (documentation which was the report of the Eckert computations carried out by the SSEC, complete with lunar position results from 1952 to 1971), with corrections as described by Eckert et al. (1966), and in
5751-411: Was a prime destination in the early 20th century for Blacks during the Great Migration from the American South, and by 1916, New York City had the largest urban African diaspora in North America. The Harlem Renaissance of literary and cultural life flourished during the era of Prohibition . The larger economic boom generated construction of skyscrapers competing in height. New York City became
5832-464: Was chief operator, and often appeared in publicity photos. The SSEC was an unusual hybrid of vacuum tubes and electromechanical relays . Approximately 12,500 vacuum tubes were used in the arithmetic unit, control, and its eight (relatively high-speed) registers , which had an access time of less than one millisecond . About 21,400 relays were used for control and 150 lower-speed registers, with an access time of 20 milliseconds. The relay technology
5913-821: Was founded. The Stamp Act Congress met in New York in October 1765, as the Sons of Liberty organization emerged in the city and skirmished over the next ten years with British troops stationed there. The Battle of Long Island , the largest battle of the American Revolutionary War , was fought in August 1776 within modern-day Brooklyn. A British rout of the Continental Army at the Battle of Fort Washington in November 1776 eliminated
5994-465: Was hired (also after a visit to the SSEC) and started a department of applied science; the operation of SSEC was eventually put into that organization. The SSEC room was one of the first computers to use a raised floor , so visitors would not see unsightly cables or trip over them. The large array of flashing lights and noisy electro-mechanical relays made IBM very visible to the public. The SSEC appeared in
6075-521: Was inhabited by Algonquians , including the Lenape . Their homeland, known as Lenapehoking , included the present-day areas of Staten Island , Manhattan , the Bronx , the western portion of Long Island (including Brooklyn and Queens ), and the Lower Hudson Valley . The first documented visit into New York Harbor by a European was in 1524 by explorer Giovanni da Verrazzano . He claimed
6156-555: Was later upheld as supporting the machine's stored program ability. Each instruction could take input from any source (electronic or mechanical registers or tape readers) store the result in any destination (electronic or mechanical registers, tape or card punch or printer), and gave the address of the next instruction, which could also be any source. This made it powerful in theory. However, in practice instructions were stored usually on paper tape, resulting in an overall rate of only about 50 instructions per second . The serial nature of
6237-514: Was named New Amsterdam in 1626 and was chartered as a city in 1653. The city came under English control in 1664 and was temporarily renamed New York after King Charles II granted the lands to his brother, the Duke of York , before being permanently renamed New York in November 1674. New York City was the U.S. capital from 1785 until 1790. The modern city was formed by the 1898 consolidation of its five boroughs : Manhattan , Brooklyn , Queens ,
6318-533: Was needed to lift the heavy reels of paper into place. The machine read instructions or data from 30 paper tape readers connected to three punches, and another a table look-up unit consisted of another 36 paper tape readers. A punched card reader was used to load data, and results were produced on punched cards or high-speed printers. The 19-digit word was stored on the card stock tape or registers in binary-coded decimal , resulting in 76 bits, with two extra bits for indicating positive or negative sign and parity, while
6399-481: Was similar to the ASCC, based on technology invented by Clair D. Lake (1888–1958). The arithmetic logic unit of the SSEC was a modified IBM 603 electronic multiplier, which had been designed by James W. Bryce . The bulky tubes were military surplus radar technology, which filled one entire wall. The memory was organized as signed 19-digit decimal numbers. Multiplication was computed with 14 digits in each factor. Most of
6480-589: Was the ENIAC successor, designed by the team who then marketed the UNIVAC. The SSEC ran until August 1952, when it was dismantled, having been made obsolete by fully electronic computers. An IBM 701 computer, known as the Defense Calculator, was installed in the same room for its April 7, 1953, public debut. In July 1953 the much less expensive (and even better selling) IBM 650 was announced, which had been developed by
6561-469: Was widely known as the Harvard Mark I . The President of IBM, Thomas J. Watson Sr. , did not like Aiken's press release that gave no credit to IBM for its funding and engineering effort. Watson and Aiken decided to go their separate ways, and IBM began work on a project to build their own larger and more visible machine. Astronomer Wallace John Eckert of Columbia University provided specifications for
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