Asian Americans are Americans of Asian ancestry. The term refers to a panethnic group that includes diverse populations, which have ancestral origins in East Asia, South Asia, or Southeast Asia, as defined by the U. S. Census Bureau; this includes people who indicate their race on the census as "Asian" or reported entries such as "Chinese, Indian, Japanese and Other Asian". Asian Americans with other ancestry comprise 5.6% of the U. S. population, while people who are Asian alone, those combined with at least one other race, make up 6.9%. Although migrants from Asia have been in parts of the contemporary United States since the 17th century, large-scale immigration did not begin until the mid-18th century. Nativist immigration laws during the 1880s–1920s excluded various Asian groups prohibiting all Asian immigration to the continental United States. After immigration laws were reformed during the 1940s–60s, abolishing national origins quotas, Asian immigration increased rapidly. Analyses of the 2010 census have shown that Asian Americans are the fastest growing racial or ethnic minority in the United States.
As with other racial and ethnicity-based terms and common usage have changed markedly through the short history of this term. Prior to the late 1960s, people of Asian ancestry were referred to as Oriental and Mongoloid. Additionally, the American definition of'Asian' included West Asian ethnic groups Jewish Americans, Armenian Americans, Assyrian Americans, Iranian Americans, Kurdish Americans, Arab Americans, although these groups are now considered Middle Eastern American; the term Asian American was coined by historian Yuji Ichioka, credited with popularizing the term, to frame a new "inter-ethnic-pan-Asian American self-defining political group" in the late 1960s. Changing patterns of immigration and an extensive period of exclusion of Asian immigrants have resulted in demographic changes that have in turn affected the formal and common understandings of what defines Asian American. For example, since the removal of restrictive "national origins" quotas in 1965, the Asian-American population has diversified to include more of the peoples with ancestry from various parts of Asia.
Today, "Asian American" is the accepted term for most formal purposes, such as government and academic research, although it is shortened to Asian in common usage. The most used definition of Asian American is the U. S. Census Bureau definition, which includes all people with origins in the Far East, Southeast Asia, the Indian subcontinent; this is chiefly because the census definitions determine many governmental classifications, notably for equal opportunity programs and measurements. According to the Oxford English Dictionary, "Asian person" in the United States is sometimes thought of as a person of East Asian descent. In vernacular usage, "Asian" is used to refer to those of East Asian descent or anyone else of Asian descent with epicanthic eyefolds; this differs from the U. S. Census definition and the Asian American Studies departments in many universities consider all those of East, South or Southeast Asian descent to be "Asian". In the US Census, people with origins or ancestry in the Far East, Southeast Asia, the Indian subcontinent are classified as part of the Asian race.
As such, "Asian" and "African" ancestry are seen as racial categories for the purposes of the Census, since they refer to ancestry only from those parts of the Asian and African continents that are outside the Middle East and North Africa. In 1980 and before, Census forms listed particular Asian ancestries as separate groups, along with white and black or negro. Asian Americans had been classified as "other". In 1977, the federal Office of Management and Budget issued a directive requiring government agencies to maintain statistics on racial groups, including on "Asian or Pacific Islander". By the 1990 census, "Asian or Pacific Islander" was included as an explicit category, although respondents had to select one particular ancestry as a subcategory. Beginning with the 2000 census, two separate categories were used: "Asian American" and "Native Hawaiian and Other Pacific Islander"; the definition of Asian American has variations that derive from the use of the word American in different contexts.
Immigration status, citizenship and language ability are some variables that are used to define American for various purposes and may vary in formal and everyday usage. For example, restricting American to include only U. S. citizens conflicts with discussions of Asian American businesses, which refer both to citizen and non-citizen owners. In a PBS interview from 2004, a panel of Asian American writers discussed how some groups include people of Middle Eastern descent in the Asian American category. Asian American author Stewart Ikeda has noted, "The definition of'Asian American' frequently depends on who's asking, who's defining, in what context, why... the possible definitions of'Asian-Pacific American' are many and shifting... some scholars in Asian American Studies conferences suggest that Russians and Israelis all might fit the field's subject of study." Jeff Yang, of the Wall Street Journal, writes that the panethnic definition of Asian American is a unique American construct, as an identity is "in beta".
Scholars have grappled with the accuracy, correctn
White Americans are Americans who are descendants from any of the white racial groups of Europe, the Middle East and North Africa or in census statistics, those who self-report as white based on having majority-white ancestry. White Americans constitute the historical and current majority of the people living in the United States, with 72% of the population in the 2010 United States Census. Non-Hispanic whites totaled about 197,285,202 or 60.7% of the U. S. population. European Americans are the largest ethnic group of White Americans and constitute the historical population of the United States since the nation's founding; the United States Census Bureau defines white people as those "having origins in any of the original peoples of Europe, the Middle East or North Africa." Like all official U. S. racial categories, "White" has a "not Hispanic or Latino" and a "Hispanic or Latino" component, the latter consisting of White Mexican Americans and White Cuban Americans. The term "Caucasian" is synonymous with "white", although the latter is sometimes used to denote skin tone instead of race.
Some of the non-European ethnic groups classified as white by the U. S. Census, such as Arab Americans, Jewish Americans, Hispanics or Latinos, may not identify as or may not be perceived to be, white; the largest ancestries of American whites are: German Americans, Irish Americans, English Americans, Italian Americans, French Americans, Polish Americans, Scottish Americans, Scotch-Irish Americans, Dutch Americans, Norwegian Americans and Swedish Americans. However, the English Americans and British Americans demography is considered a serious under-count as the stock tend to self-report and identify as "Americans", due to the length of time they have inhabited the United States if their family arrived prior to the American Revolution; the vast majority of white Americans have ancestry from multiple countries. Definitions of, "White" have changed throughout the history of the United States; the term "White American" can encompass many different ethnic groups. Although the United States Census purports to reflect a social definition of race, the social dimensions of race are more complex than Census criteria.
The 2000 U. S. census states that racial categories "generally reflect a social definition of race recognized in this country. They do not conform to any biological, anthropological or genetic criteria."The Census question on race lists the categories White or European American, Black or African American, American Indian and Alaska Native, Native Hawaiian or Other Pacific Islander, plus "Some other race", with the respondent having the ability to mark more than one racial and or ethnic category. The Census Bureau defines White people as follows: "White" refers to a person having origins in any of the original peoples of Europe, the Middle East or North Africa, it includes people who indicated their race as "White" or reported entries such as German, Lebanese, Moroccan, or Caucasian. In U. S. census documents, the designation White overlaps, as do all other official racial categories, with the term Hispanic or Latino, introduced in the 1980 census as a category of ethnicity and independent of race.
Hispanic and Latino Americans as a whole make up a racially diverse group and as a whole are the largest minority in the country. The characterization of Middle Eastern and North African Americans as white has been a matter of controversy. In the early 20th century, peoples of Arab descent were sometimes denied entry into the United States because they were characterized as nonwhite. In 1944, the law changed, Middle Eastern and North African peoples were granted white status; the U. S. Census is revisiting the issue, considering creating a separate racial category for Middle Eastern and North African Americans in the 2020 Census. In cases where individuals do not self-identify, the U. S. census parameters for race give each national origin a racial value. Additionally, people who reported Muslim, Zoroastrian, or Caucasian as their "race" in the "Some other race" section, without noting a country of origin, are automatically tallied as White; the US Census considers the write-in response of "Caucasian" or "Aryan" to be a synonym for White in their ancestry code listing.
In the contemporary United States anyone of European descent is considered White. However, many of the non-European ethnic groups classified as White by the U. S. Census, such as Arab Americans, Jewish Americans, Hispanics or Latinos may not identify as, may not be perceived to be, White; the definition of White has changed over the course of American history. Among Europeans, those not considered White at some point in American history include Italians, Spaniards, Swedes and Russians. Early on in the United States, membership in the white race was limited to those of British, Germanic, or Nordic ancestry. David R. Roediger argues that the construction of the white race in the United States was an effort to mentally distance slave owners from slaves; the process of being defined as white by law came about in court disputes over pursuit of citizenship. Critical race theory developed in the 1970s and 1980s, influenced by the language of critical legal studies, which challenged concepts such as objective truth and judicial neutrality, by critical theory.
Academics and activists disillusioned with the outcomes of the Civil Rights Movement pointed out that though African Americans enjoyed legal equality, white Americans continued to hold disproportionate power and still had superior living standards
Hispanic and Latino Americans
Hispanic Americans and Latino Americans are Americans who are descendants of people from Spain and Latin America, respectively. More it includes all Americans who speak the Spanish language natively, who self-identify as Hispanic or Latino, whether of full or partial ancestry. For the 2010 United States Census, people counted as "Hispanic" or "Latino" were those who identified as one of the specific Hispanic or Latino categories listed on the census questionnaire as well as those who indicated that they were "other Spanish, Hispanic or Latino." The national origins classified as Hispanic or Latino by the United States Census Bureau are the following: Argentine, Colombian, Puerto Rican, Mexican, Costa Rican, Honduran, Panamanian, Bolivian, Spanish American, Ecuadorian, Peruvian and Venezuelan. Brazilian Americans, other Portuguese-speaking Latino groups, non-Spanish speaking Latino groups in the United States are defined as "Latino" by some U. S. government agencies. The Census Bureau uses the terms Hispanic and Latino interchangeably."Origin" can be viewed as the ancestry, nationality group, lineage or country of birth of the person or the person's parents or ancestors before their arrival in the United States.
People who identify as Spanish, Hispanic or Latino may be of any race. As one of the only two designated categories of ethnicity in the United States, Hispanics form a pan-ethnicity incorporating a diversity of inter-related cultural and linguistic heritages. Most Hispanic Americans are of Mexican, Puerto Rican, Salvadoran, Guatemalan or Colombian origin; the predominant origin of regional Hispanic populations varies in different locations across the country. Hispanic Americans are the second fastest-growing ethnic group by percentage growth in the United States after Asian Americans. Hispanic/Latinos overall are the second-largest ethnic group in the United States, after non-Hispanic whites. Hispanics have lived within what is now the United States continuously since the founding of St. Augustine by the Spanish in 1565. After Native Americans, Hispanics are the oldest ethnic group to inhabit much of what is today the United States. Many have Native American ancestry. Spain colonized large areas of what is today the American Southwest and West Coast, as well as Florida.
Its holdings included present-day California, New Mexico, Nevada and Texas, all of which were part of the Republic of Mexico from its independence in 1821 until the end of the Mexican–American War in 1848. Conversely, Hispanic immigrants to the New York-New Jersey metropolitan area derive from a broad spectrum of Latin American states. A study published in 2015 in the American Journal of Human Genetics, based on 23andMe data from 8,663 self-described Latinos, estimated that Latinos in the United States carried a mean of 65.1% European ancestry, 18.0% Native American ancestry, 6.2% African ancestry. The study found that self-described Latinos from the Southwest those along the Mexican border, had the highest mean levels of Native American ancestry; the terms "Hispanic" and "Latino" refer to an ethnicity. Hispanic people may share some commonalities in their language, culture and heritage. According to the Smithsonian Institution, the term "Latino" includes peoples with Portuguese roots, such as Brazilians, as well as those of Spanish-language origin.
In the United States, many Hispanics and Latinos are of both Native American ancestry. Others are predominantly of European ancestry or of Amerindian ancestry. Many Hispanics and Latinos from the Caribbean, as well as other regions of Latin America where African slavery was widespread, may be of sub-Saharan African descent as well; the difference between the terms Hispanic and Latino is confusing to some. The U. S. Census Bureau equates the two terms and defines them as referring to anyone from Spain and the Spanish-speaking countries of the Americas. After the Mexican–American War concluded in 1848, term Hispanic or Spanish American was used to describe the Hispanos of New Mexico within the American Southwest; the 1970 United States Census controversially broadened the definition to "a person of Mexican, Puerto Rican, South or Central American, or other Spanish culture or origin, regardless of race". This is now the common formal and colloquial definition of the term within the United States, outside of New Mexico.
The term Latino has developed a number of definitions. One definition of Latino is "a Latin male in the United States"; this is the oldest and the original definition used in the United States, first used in 1946. This definition encompasses Spanish speakers from both Europe and the Americas. Under this definition, immigrants from Spain and immigrants from Latin America are both Latino; this definition is consistent with the 21st-century usage by the U. S. Census Bureau and OMB, as the two agencies use Latino interchangeably. A definition of Latino is as a condensed form of the term "Latino-Americano", the Spanish word for Latin-American, or someone who comes from Latin America. Under this definition a Mexican American or Puerto Rican, for example, is both a Hispanic and a Latino. A Brazilian American is a Latino by this definition, which includes those of Portuguese-speaking origin from Latin America. However, an immigrant from Spain would be classified as European or White by American sta
The United States of America known as the United States or America, is a country composed of 50 states, a federal district, five major self-governing territories, various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is smaller than the entire continent of Europe's 3.9 million square miles. With a population of over 327 million people, the U. S. is the third most populous country. The capital is Washington, D. C. and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico; the State of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The State of Hawaii is an archipelago in the mid-Pacific Ocean; the U. S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The diverse geography and wildlife of the United States make it one of the world's 17 megadiverse countries.
Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago. European colonization began in the 16th century; the United States emerged from the thirteen British colonies established along the East Coast. Numerous disputes between Great Britain and the colonies following the French and Indian War led to the American Revolution, which began in 1775, the subsequent Declaration of Independence in 1776; the war ended in 1783 with the United States becoming the first country to gain independence from a European power. The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill of Rights, being ratified in 1791 to guarantee many fundamental civil liberties; the United States embarked on a vigorous expansion across North America throughout the 19th century, acquiring new territories, displacing Native American tribes, admitting new states until it spanned the continent by 1848. During the second half of the 19th century, the Civil War led to the abolition of slavery.
By the end of the century, the United States had extended into the Pacific Ocean, its economy, driven in large part by the Industrial Revolution, began to soar. The Spanish–American War and World War I confirmed the country's status as a global military power; the United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, a permanent member of the United Nations Security Council. Sweeping civil rights legislation, notably the Civil Rights Act of 1964, the Voting Rights Act of 1965 and the Fair Housing Act of 1968, outlawed discrimination based on race or color. During the Cold War, the United States and the Soviet Union competed in the Space Race, culminating with the 1969 U. S. Moon landing; the end of the Cold War and the collapse of the Soviet Union in 1991 left the United States as the world's sole superpower. The United States is the world's oldest surviving federation, it is a representative democracy.
The United States is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States, other international organizations. The United States is a developed country, with the world's largest economy by nominal GDP and second-largest economy by PPP, accounting for a quarter of global GDP; the U. S. economy is post-industrial, characterized by the dominance of services and knowledge-based activities, although the manufacturing sector remains the second-largest in the world. The United States is the world's largest importer and the second largest exporter of goods, by value. Although its population is only 4.3% of the world total, the U. S. holds 31% of the total wealth in the world, the largest share of global wealth concentrated in a single country. Despite wide income and wealth disparities, the United States continues to rank high in measures of socioeconomic performance, including average wage, human development, per capita GDP, worker productivity.
The United States is the foremost military power in the world, making up a third of global military spending, is a leading political and scientific force internationally. In 1507, the German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere America in honor of the Italian explorer and cartographer Amerigo Vespucci; the first documentary evidence of the phrase "United States of America" is from a letter dated January 2, 1776, written by Stephen Moylan, Esq. to George Washington's aide-de-camp and Muster-Master General of the Continental Army, Lt. Col. Joseph Reed. Moylan expressed his wish to go "with full and ample powers from the United States of America to Spain" to seek assistance in the revolutionary war effort; the first known publication of the phrase "United States of America" was in an anonymous essay in The Virginia Gazette newspaper in Williamsburg, Virginia, on April 6, 1776. The second draft of the Articles of Confederation, prepared by John Dickinson and completed by June 17, 1776, at the latest, declared "The name of this Confederation shall be the'United States of America'".
The final version of the Articles sent to the states for ratification in late 1777 contains the sentence "The Stile of this Confederacy shall be'The United States of America'". In June 1776, Thomas Jefferson wrote the phrase "UNITED STATES OF AMERICA" in all capitalized letters in the headline of his "original Rough draught" of the Declaration of Independence; this draft of the document did not surface unti
Chicago the City of Chicago, is the most populous city in Illinois, as well as the third most populous city in the United States. With an estimated population of 2,716,450, it is the most populous city in the Midwest. Chicago is the principal city of the Chicago metropolitan area referred to as Chicagoland, the county seat of Cook County, the second most populous county in the United States; the metropolitan area, at nearly 10 million people, is the third-largest in the United States, the fourth largest in North America and the third largest metropolitan area in the world by land area. Located on the shores of freshwater Lake Michigan, Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed and grew in the mid-nineteenth century. After the Great Chicago Fire of 1871, which destroyed several square miles and left more than 100,000 homeless, the city made a concerted effort to rebuild; the construction boom accelerated population growth throughout the following decades, by 1900 Chicago was the fifth largest city in the world.
Chicago made noted contributions to urban planning and zoning standards, including new construction styles, the development of the City Beautiful Movement, the steel-framed skyscraper. Chicago is an international hub for finance, commerce, technology, telecommunications, transportation, it is the site of the creation of the first standardized futures contracts at the Chicago Board of Trade, which today is the largest and most diverse derivatives market gobally, generating 20% of all volume in commodities and financial futures. O'Hare International Airport is the one of the busiest airports in the world, the region has the largest number of U. S. highways and greatest amount of railroad freight. In 2012, Chicago was listed as an alpha global city by the Globalization and World Cities Research Network, it ranked seventh in the entire world in the 2017 Global Cities Index; the Chicago area has one of the highest gross domestic products in the world, generating $680 billion in 2017. In addition, the city has one of the world's most diversified and balanced economies, not being dependent on any one industry, with no single industry employing more than 14% of the workforce.
Chicago's 58 million domestic and international visitors in 2018, made it the second most visited city in the nation, behind New York City's approximate 65 million visitors. The city ranked first place in the 2018 Time Out City Life Index, a global quality of life survey of 15,000 people in 32 cities. Landmarks in the city include Millennium Park, Navy Pier, the Magnificent Mile, the Art Institute of Chicago, Museum Campus, the Willis Tower, Grant Park, the Museum of Science and Industry, Lincoln Park Zoo. Chicago's culture includes the visual arts, film, comedy and music jazz, soul, hip-hop and electronic dance music including house music. Of the area's many colleges and universities, the University of Chicago, Northwestern University, the University of Illinois at Chicago are classified as "highest research" doctoral universities. Chicago has professional sports teams in each of the major professional leagues, including two Major League Baseball teams; the name "Chicago" is derived from a French rendering of the indigenous Miami-Illinois word shikaakwa for a wild relative of the onion, known to botanists as Allium tricoccum and known more as ramps.
The first known reference to the site of the current city of Chicago as "Checagou" was by Robert de LaSalle around 1679 in a memoir. Henri Joutel, in his journal of 1688, noted that the eponymous wild "garlic" grew abundantly in the area. According to his diary of late September 1687:...when we arrived at the said place called "Chicagou" which, according to what we were able to learn of it, has taken this name because of the quantity of garlic which grows in the forests in this region. The city has had several nicknames throughout its history such as the Windy City, Chi-Town, Second City, the City of the Big Shoulders, which refers to the city's numerous skyscrapers and high-rises. In the mid-18th century, the area was inhabited by a Native American tribe known as the Potawatomi, who had taken the place of the Miami and Sauk and Fox peoples; the first known non-indigenous permanent settler in Chicago was Jean Baptiste Point du Sable. Du Sable arrived in the 1780s, he is known as the "Founder of Chicago".
In 1795, following the Northwest Indian War, an area, to be part of Chicago was turned over to the United States for a military post by native tribes in accordance with the Treaty of Greenville. In 1803, the United States Army built Fort Dearborn, destroyed in 1812 in the Battle of Fort Dearborn and rebuilt; the Ottawa and Potawatomi tribes had ceded additional land to the United States in the 1816 Treaty of St. Louis; the Potawatomi were forcibly removed from their land after the Treaty of Chicago in 1833. On August 12, 1833, the Town of Chicago was organized with a population of about 200. Within seven years it grew to more than 4,000 people. On June 15, 1835, the first public land sales began with Edmund Dick Taylor as U. S. Receiver of Public Monies; the City of Chicago was incorporated on Saturday, March 4, 1837, for several decades was the world's fastest-growing city. As the site of the Chicago Portage, the city became an important transportation hub between the eastern and western United States.
Chicago's first railway and Chicago Union Railroad, the Illi
Race and ethnicity in the United States Census
Race and ethnicity in the United States Census, defined by the federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most identify, indicate whether or not they are of Hispanic or Latino origin. The racial categories represent a social-political construct for the race or races that respondents consider themselves to be and, "generally reflect a social definition of race recognized in this country." OMB defines the concept of race as outlined for the US Census as not "scientific or anthropological" and takes into account "social and cultural characteristics as well as ancestry", using "appropriate scientific methodologies" that are not "primarily biological or genetic in reference." The race categories include both national-origin groups. Race and ethnicity are considered separate and distinct identities, with Hispanic or Latino origin asked as a separate question. Thus, in addition to their race or races, all respondents are categorized by membership in one of two ethnic categories, which are "Hispanic or Latino" and "Not Hispanic or Latino".
However, the practice of separating "race" and "ethnicity" as different categories has been criticized both by the American Anthropological Association and members of US Commission on Civil Rights. In 1997, OMB issued a Federal Register notice regarding revisions to the standards for the classification of federal data on race and ethnicity. OMB developed race and ethnic standards in order to provide "consistent data on race and ethnicity throughout the Federal Government; the development of the data standards stem in large measure from new responsibilities to enforce civil rights laws." Among the changes, OMB issued the instruction to "mark one or more races" after noting evidence of increasing numbers of interracial children and wanting to capture the diversity in a measurable way and having received requests by people who wanted to be able to acknowledge their or their children's full ancestry rather than identifying with only one group. Prior to this decision, the Census and other government data collections asked people to report only one race.
The OMB states, "many federal programs are put into effect based on the race data obtained from the decennial census. Race data are critical for the basic research behind many policy decisions. States require these data to meet legislative redistricting requirements; the data are needed to monitor compliance with the Voting Rights Act by local jurisdictions". "Data on ethnic groups are important for putting into effect a number of federal statutes. Data on Ethnic Groups are needed by local governments to run programs and meet legislative requirements." The 1790 United States Census was the first census in the history of the United States. The population of the United States was recorded as 3,929,214 as of Census Day, August 2, 1790, as mandated by Article I, Section 2 of the United States Constitution and applicable laws."The law required that every household be visited, that completed census schedules be posted in'two of the most public places within, there to remain for the inspection of all concerned...' and that'the aggregate amount of each description of persons' for every district be transmitted to the president."
This law along with U. S. marshals were responsible for governing the census. One third of the original census data has been lost or destroyed since documentation; the data was lost in 1790–1830 time period and included data from: Connecticut, Maryland, New Hampshire, New York, North Carolina, Rhode Island, South Carolina, Delaware, New Jersey, Virginia. Census data included the name of the head of the family and categorized inhabitants as follows: free white males at least 16 years of age, free white males under 16 years of age, free white females, all other free persons, slaves. Thomas Jefferson the Secretary of State, directed marshals to collect data from all thirteen states, from the Southwest Territory; the census was not conducted in Vermont until 1791, after that state's admission to the Union as the 14th state on March 4 of that year. There was some doubt surrounding the numbers, President George Washington and Thomas Jefferson maintained the population was undercounted; the potential reasons Washington and Jefferson may have thought this could be refusal to participate, poor public transportation and roads, spread out population, restraints of current technology.
No microdata from the 1790 population census is available, but aggregate data for small areas and their compatible cartographic boundary files, can be downloaded from the National Historical Geographic Information System. In 1800 and 1810, the age question regarding free white males was more detailed; the 1820
A ZIP Code is a postal code used by the United States Postal Service in a system it introduced in 1963. The term ZIP is an acronym for Zone Improvement Plan; the basic format consists of five digits. An extended ZIP+4 code was introduced in 1983 which includes the five digits of the ZIP Code, followed by a hyphen and four additional digits that reference a more specific location; the term ZIP Code was registered as a servicemark by the U. S. Postal Service, but its registration has since expired; the early history and context of postal codes began with postal district/zone numbers. The United States Post Office Department implemented postal zones for numerous large cities in 1943. For example: The "16" was the number of the postal zone in the specific city. By the early 1960s, a more organized system was needed, non-mandatory five-digit ZIP Codes were introduced nationwide on July 1, 1963; the USPOD issued its Publication 59: Abbreviations for Use with ZIP Code on October 1, 1963, with the list of two-letter state abbreviations which are written with both letters capitalized.
An earlier list in June had proposed capitalized abbreviations ranging from two to five letters. According to Publication 59, the two-letter standard was "based on a maximum 23-position line, because this has been found to be the most universally acceptable line capacity basis for major addressing systems", which would be exceeded by a long city name combined with a multi-letter state abbreviation, such as "Sacramento, Calif." along with the ZIP Code. The abbreviations have remained unchanged, with the exception of Nebraska, changed from NB to NE in 1969 at the request of the Canadian postal administration, to avoid confusion with the Canadian province of New Brunswick. Robert Moon is considered the father of the ZIP Code; the post office only credits Moon with the first three digits of the ZIP Code, which describe the sectional center facility or "sec center." An SCF is a central mail processing facility with those three digits. The fourth and fifth digits, which give a more precise locale within the SCF, were proposed by Henry Bentley Hahn Sr.
The SCF sorts mail to all post offices with those first three digits in their ZIP Codes. The mail is sorted according to the final two digits of the ZIP Code and sent to the corresponding post offices in the early morning. Sectional centers do not deliver mail and are not open to the public, most of their employees work the night shift. Mail picked up at post offices is sent to their own SCF in the afternoon, where the mail is sorted overnight. In the case of large cities, the last two digits coincide with the older postal zone number thus: In 1967, these became mandatory for second- and third-class bulk mailers, the system was soon adopted generally; the United States Post Office used a cartoon character, which it called Mr. ZIP, to promote the use of the ZIP Code, he was depicted with a legend such as "USE ZIP CODE" in the selvage of panes of postage stamps or on the covers of booklet panes of stamps. In 1971 Elmira Star-Gazette reporter Dick Baumbach found out the White House was not using a ZIP Code on its envelopes.
Herb Klein, special assistant to President Nixon, responded by saying the next printing of envelopes would include the ZIP Code. In 1983, the U. S. Postal Service introduced an expanded ZIP Code system that it called ZIP+4 called "plus-four codes", "add-on codes", or "add-ons". A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a city block, a group of apartments, an individual high-volume receiver of mail, a post office box, or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery. However, initial attempts to promote universal use of the new format met with public resistance and today the plus-four code is not required. In general, mail is read by a multiline optical character reader that instantly determines the correct ZIP+4 Code from the address—along with the more specific delivery point—and sprays an Intelligent Mail barcode on the face of the mail piece that corresponds to 11 digits—nine for the ZIP+4 Code and two for the delivery point.
For Post Office Boxes, the general rule is. The add-on code is one of the following: the last four digits of the box number, zero plus the last three digits of the box number, or, if the box number consists of fewer than four digits, enough zeros are attached to the front of the box number to produce a four-digit number. However, there is no uniform rule, so the ZIP+4 Code must be looked up individually for each box; the ZIP Code is translated into an Intelligent Mail barcode, printed on the mailpiece to make it easier for automated machines to sort. A barcode can be printed by the sender, it is better to let the post office put one on. In general, the post office uses OCR technology, though in some cases a human might have to read and enter the address. Customers who send bulk mail can get a discount on postage if they have printed the barcode themselves and have presorted the mai