London is the capital and largest city of both England and the United Kingdom. Standing on the River Thames in the south-east of England, at the head of its 50-mile estuary leading to the North Sea, London has been a major settlement for two millennia. Londinium was founded by the Romans; the City of London, London's ancient core − an area of just 1.12 square miles and colloquially known as the Square Mile − retains boundaries that follow its medieval limits. The City of Westminster is an Inner London borough holding city status. Greater London is governed by the Mayor of the London Assembly. London is considered to be one of the world's most important global cities and has been termed the world's most powerful, most desirable, most influential, most visited, most expensive, sustainable, most investment friendly, most popular for work, the most vegetarian friendly city in the world. London exerts a considerable impact upon the arts, education, fashion, healthcare, professional services and development, tourism and transportation.
London ranks 26 out of 300 major cities for economic performance. It is one of the largest financial centres and has either the fifth or sixth largest metropolitan area GDP, it is the most-visited city as measured by international arrivals and has the busiest city airport system as measured by passenger traffic. It is the leading investment destination, hosting more international retailers and ultra high-net-worth individuals than any other city. London's universities form the largest concentration of higher education institutes in Europe. In 2012, London became the first city to have hosted three modern Summer Olympic Games. London has a diverse range of people and cultures, more than 300 languages are spoken in the region, its estimated mid-2016 municipal population was 8,787,892, the most populous of any city in the European Union and accounting for 13.4% of the UK population. London's urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants at the 2011 census.
The population within the London commuter belt is the most populous in the EU with 14,040,163 inhabitants in 2016. London was the world's most populous city from c. 1831 to 1925. London contains four World Heritage Sites: the Tower of London. Other landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral, Tower Bridge, Trafalgar Square and The Shard. London has numerous museums, galleries and sporting events; these include the British Museum, National Gallery, Natural History Museum, Tate Modern, British Library and West End theatres. The London Underground is the oldest underground railway network in the world. "London" is an ancient name, attested in the first century AD in the Latinised form Londinium. Over the years, the name has attracted many mythicising explanations; the earliest attested appears in Geoffrey of Monmouth's Historia Regum Britanniae, written around 1136. This had it that the name originated from a supposed King Lud, who had taken over the city and named it Kaerlud.
Modern scientific analyses of the name must account for the origins of the different forms found in early sources Latin, Old English, Welsh, with reference to the known developments over time of sounds in those different languages. It is agreed; this was adapted into Latin as Londinium and borrowed into Old English, the ancestor-language of English. The toponymy of the Common Brythonic form is much debated. A prominent explanation was Richard Coates's 1998 argument that the name derived from pre-Celtic Old European *lowonida, meaning "river too wide to ford". Coates suggested that this was a name given to the part of the River Thames which flows through London. However, most work has accepted a Celtic origin for the name, recent studies have favoured an explanation along the lines of a Celtic derivative of a proto-Indo-European root *lendh-, combined with the Celtic suffix *-injo- or *-onjo-. Peter Schrijver has suggested, on these grounds, that the name meant'place that floods'; until 1889, the name "London" applied to the City of London, but since it has referred to the County of London and Greater London.
"London" is sometimes written informally as "LDN". In 1993, the remains of a Bronze Age bridge were found on the south foreshore, upstream of Vauxhall Bridge; this bridge either reached a now lost island in it. Two of those timbers were radiocarbon dated to between 1750 BC and 1285 BC. In 2010 the foundations of a large timber structure, dated to between 4800 BC and 4500 BC, were found on the Thames's south foreshore, downstream of Vauxhall Bridge; the function of the mesolithic structure is not known. Both structures are on the south bank. Although there is evidence of scattered Brythonic settlements in the area, the first major settlement was founded by the Romans about four years after the invasion
The Independent is a British online newspaper. Established in 1986 as a politically independent national morning newspaper published in London, it was controlled by Tony O'Reilly's Independent News & Media from 1997 until it was sold to Russian oligarch Alexander Lebedev in 2010; the last printed edition of The Independent was published on Saturday 26 March 2016, leaving only its digital editions. Nicknamed the Indy, it began as a broadsheet, but changed to tabloid format in 2003; until September 2011, the paper described itself on the banner at the top of every newspaper as "free from party political bias, free from proprietorial influence". It tends to take a pro-market stance on economic issues; the daily edition was named National Newspaper of the Year at the 2004 British Press Awards. In June 2015, it had an average daily circulation of just below 58,000, 85 per cent down from its 1990 peak, while the Sunday edition had a circulation of just over 97,000. Launched in 1986, the first issue of The Independent was published on 7 October in broadsheet format.
It was produced by Newspaper Publishing plc and created by Andreas Whittam Smith, Stephen Glover and Matthew Symonds. All three partners were former journalists at The Daily Telegraph who had left the paper towards the end of Lord Hartwell's ownership. Marcus Sieff was the first chairman of Newspaper Publishing, Whittam Smith took control of the paper; the paper was created at a time of a fundamental change in British newspaper publishing. Rupert Murdoch was challenging long-accepted practices of the print unions and defeated them in the Wapping dispute. Production costs could be reduced which, it was said at the time, created openings for more competition; as a result of controversy around Murdoch's move to Wapping, the plant was having to function under siege from sacked print workers picketing outside. The Independent attracted some of the staff from the two Murdoch broadsheets who had chosen not to move to his company's new headquarters. Launched with the advertising slogan "It is. Are you?", challenging both The Guardian for centre-left readers and The Times as the newspaper of record, The Independent reached a circulation of over 400,000 by 1989.
Competing in a moribund market, The Independent sparked a general freshening of newspaper design as well as, within a few years, a price war in the market sector. When The Independent launched The Independent on Sunday in 1990, sales were less than anticipated due to the launch of the Sunday Correspondent four months prior, although this direct rival closed at the end of November 1990; some aspects of production merged with the main paper, although the Sunday paper retained a distinct editorial staff. In the 1990s, The Independent was faced with price cutting by the Murdoch titles, started an advertising campaign accusing The Times and The Daily Telegraph of reflecting the views of their proprietors, Rupert Murdoch and Conrad Black, it featured spoofs of the other papers' mastheads with the words The Rupert Murdoch or The Conrad Black, with The Independent below the main title. Newspaper Publishing had financial problems. A number of other media companies were interested in the paper. Tony O'Reilly's media group and Mirror Group Newspapers had bought a stake of about a third each by mid-1994.
In March 1995, Newspaper Publishing was restructured with a rights issue, splitting the shareholding into O'Reilly's Independent News & Media, MGN, Prisa. In April 1996, there was another refinancing, in March 1998, O'Reilly bought the other shares of the company for £30 million, assumed the company's debt. Brendan Hopkins headed Independent News, Andrew Marr was appointed editor of The Independent, Rosie Boycott became editor of The Independent on Sunday. Marr introduced a dramatic if short-lived redesign which won critical favour but was a commercial failure as a result of a limited promotional budget. Marr admitted his changes had been a mistake in My Trade. Boycott left in April 1998 to join the Daily Express, Marr left in May 1998 becoming the BBC's political editor. Simon Kelner was appointed as the editor. By this time the circulation had fallen below 200,000. Independent News spent to increase circulation, the paper went through several redesigns. While circulation increased, it did not approach the level, achieved in 1989, or restore profitability.
Job cuts and financial controls reduced the quality of the product. Ivan Fallon, on the board since 1995 and a key figure at The Sunday Times, replaced Hopkins as head of Independent News & Media in July 2002. By mid-2004, the newspaper was losing £5 million per year. A gradual improvement meant. In November 2008, following further staff cuts, production was moved to Northcliffe House, in Kensington High Street, the headquarters of Associated Newspapers; the two newspaper groups' editorial and commercial operations remained separate, but they shared services including security, information technology and payroll. On 25 March 2010, Independent News & Media sold the newspaper to Russian oligarch Alexander Lebedev for a nominal £1 fee and £9.25m over the next 10 months, choosing this option over closing The Independent and The Independent on Sunday, which would have cost £28m and £40m due to long-term contracts. In 2009, Lebedev had bought a controlling stake in the London Evening Standard. Two weeks editor Roger Alton resigned.
In July 2011, The Independent's columnist Johann Hari was stripped of the Orwell Prize he had won in 2008 after claims, to which Hari admitted, of plagiarism and inaccuracy. In January 2012, Chris Blackhurst
Social networking service
A social networking service is an online platform which people use to build social networks or social relations with other people who share similar personal or career interests, backgrounds or real-life connections. The social network is distributed across various computer networks; the social networks are inherently computer networks, linking people and knowledge. Social networking services vary in the number of features, they can incorporate a range of new information and communication tools, operating on desktops and on laptops, on mobile devices such as tablet computers and smartphones. They may feature "web logging" diary entries online. Online community services are sometimes considered social-network services by programmers and users, though in a broader sense, a social-network service provides an individual-centered service whereas online community services are group-centered. Defined as "websites that facilitate the building of a network of contacts in order to exchange various types of content online," social networking sites provide a space for interaction to continue beyond in person interactions.
These computer mediated interactions link members of various networks and may help to both maintain and develop new social ties. Social networking sites allow users to share ideas, digital photos and videos, to inform others about online or real-world activities and events with people in their network. While in-person social networking – such as gathering in a village market to talk about events – has existed since the earliest development of towns, the Web enables people to connect with others who live in different locations, ranging from across a city to across the world. Depending on the social media platform, members may be able to contact any other member. In other cases, members can contact anyone they have a connection to, subsequently anyone that contact has a connection to, so on; the success of social networking services can be seen in their dominance in society today, with Facebook having a massive 2.13 billion active monthly users and an average of 1.4 billion daily active users in 2017.
LinkedIn, a career-oriented social-networking service requires that a member know another member in real life before they contact them online. Some services require members to have a preexisting connection to contact other members; the main types of social networking services contain category places, means to connect with friends, a recommendation system linked to trust. One can categorize social-network services into three types: socializing social network services used for socializing with existing friends online social networks are decentralized and distributed computer networks where users communicate with each other through internet services. Networking social network services used for non-social interpersonal communication social navigation social network services used for helping users to find specific information or resources There have been attempts to standardize these services to avoid the need to duplicate entries of friends and interests. A study reveals that India recorded world's largest growth in terms of social media users in 2013.
A 2013 survey found that 73% of U. S. adults use social-networking sites. There is a variety of social networking services available online. However, most incorporate common features: social networking services are Web 2.0, Internet-based applications user-generated content is the lifeblood of social networking services. Users create service-specific profiles for the site or app that are designed and maintained by the SNS organization social networking services facilitate the development of online social networks by connecting a user's profile with those of other individuals or groups; the variety and evolving range of stand-alone and built-in social networking services in the online space introduces a challenge of definition. Furthermore, the idea that these services are defined by their ability to bring people together and provides too broad a definition; such a broad definition would suggest that the telegraph and telephone were social networking services – not the Internet technologies scholars are intending to describe.
The terminology is unclear, with some referring to social networking services as social media. A recent attempt at providing a clear definition reviewed the prominent literature in the area and identified four commonalities unique to current social networking services: social networking services are interactive Web 2.0 Internet-based applications, user-generated content, such as user-submitted digital photos, text posts, "tagging", online comments, diary-style "web logs", is the lifeblood of the SNS organism, users create service-specific profiles for the site or app that are designed and maintained by the SNS organization, social networking services facilitate the development of social networks online by connecting a user's profile with those of other individuals or groups. The potential for computer networking to facilitate newly improved forms of computer-mediated social interaction was suggested early on. Efforts to support social networks via computer-mediated communication were made in many early online services, including Usenet, ARPANET, LISTSERV, bulletin board services.
Many prototypical features of social networking sites were present in online services such as America Online, CompuServe, ChatNet, The WELL. Early social netw
A mobile app or mobile application is a computer program or software application designed to run on a mobile device such as a phone/tablet or watch. Apps were intended for productivity assistance such as Email and contact databases, but the public demand for apps caused rapid expansion into other areas such as mobile games, factory automation, GPS and location-based services, order-tracking, ticket purchases, so that there are now millions of apps available. Apps are downloaded from application distribution platforms which are operated by the owner of the mobile operating system, such as the App Store or Google Play Store; some apps are free, others have a price, with the profit being split between the application's creator and the distribution platform. Mobile applications stand in contrast to desktop applications which are designed to run on desktop computers, web applications which run in mobile web browsers rather than directly on the mobile device. In 2009, technology columnist David Pogue said that newer smartphones could be nicknamed "app phones" to distinguish them from earlier less-sophisticated smartphones.
The term "app", short for "software application", has since become popular. Most mobile devices are sold with several apps bundled as pre-installed software, such as a web browser, email client, mapping program, an app for buying music, other media, or more apps; some pre-installed apps can be removed by an ordinary uninstall process, thus leaving more storage space for desired ones. Where the software does not allow this, some devices can be rooted to eliminate the undesired apps. Apps that are not preinstalled are available through distribution platforms called app stores, they began appearing in 2008 and are operated by the owner of the mobile operating system, such as the Apple App Store, Google Play, Windows Phone Store, BlackBerry App World. However, there are independent app stores, such as GetJar and F-Droid; some apps are free. They are downloaded from the platform to a target device, but sometimes they can be downloaded to laptops or desktop computers. For apps with a price a percentage, 20-30%, goes to the distribution provider, the rest goes to the producer of the app.
The same app can, cost a different price depending on the mobile platform. Apps can be installed manually, for example by running an Android application package on Android devices. Mobile apps were offered for general productivity and information retrieval, including email, contacts, the stock market and weather information. However, public demand and the availability of developer tools drove rapid expansion into other categories, such as those handled by desktop application software packages; as with other software, the explosion in number and variety of apps made discovery a challenge, which in turn led to the creation of a wide range of review and curation sources, including blogs and dedicated online app-discovery services. In 2014 government regulatory agencies began trying to regulate and curate apps medical apps; some companies offer apps as an alternative method to deliver content with certain advantages over an official website. With a growing number of mobile applications available at app stores and the improved capabilities of smartphones, people are downloading more applications to their devices.
Usage of mobile apps has become prevalent across mobile phone users. A May 2012 comScore study reported that during the previous quarter, more mobile subscribers used apps than browsed the web on their devices: 51.1% vs. 49.8% respectively. Researchers found that usage of mobile apps correlates with user context and depends on user's location and time of the day. Mobile apps are playing an ever-increasing role within healthcare and when designed and integrated can yield many benefits. Market research firm Gartner predicted that 102 billion apps would be downloaded in 2013, which would generate $26 billion in the US, up 44.4% on 2012's US$18 billion. By Q2 2015, the Google Play and Apple stores alone generated $5 billion. An analyst report estimates that the app economy creates revenues of more than €10 billion per year within the European Union, while over 529,000 jobs have been created in 28 EU states due to the growth of the app market. There are three kinds of apps — native and web-based. All apps targeted towards particular mobile platforms are known as native apps.
Therefore, an app meant for Apple device will never open in Android devices. This is. While developing native apps, professionals incorporate best-in-class user interface modules; this accounts for better performance and good user experience. Users benefit from wider access to APIs and make limitless use of all apps from the particular device. Further, they switch over from one app to another effortlessly; the main purpose behind creating such apps is to ensure best performance for specific mobile operating system. Concept of hybrid apps is a mix of web-based apps. Apps developed using Xamarin, React Native, Sencha Touch and other similar technology fall within this category; these are made to support web and native technologies across multiple platforms, hence the name hybrid. Moreover, these apps are faster to develop, it involves use of single code. Despite such advantages, hybrid apps are slower in performance. Apps fail to bear the same look n feel in different mobile op
An operating system is system software that manages computer hardware and software resources and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may include accounting software for cost allocation of processor time, mass storage and other resources. For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between programs and the computer hardware, although the application code is executed directly by the hardware and makes system calls to an OS function or is interrupted by it. Operating systems are found on many devices that contain a computer – from cellular phones and video game consoles to web servers and supercomputers; the dominant desktop operating system is Microsoft Windows with a market share of around 82.74%. MacOS by Apple Inc. is in second place, the varieties of Linux are collectively in third place. In the mobile sector, use in 2017 is up to 70% of Google's Android and according to third quarter 2016 data, Android on smartphones is dominant with 87.5 percent and a growth rate 10.3 percent per year, followed by Apple's iOS with 12.1 percent and a per year decrease in market share of 5.2 percent, while other operating systems amount to just 0.3 percent.
Linux distributions are dominant in supercomputing sectors. Other specialized classes of operating systems, such as embedded and real-time systems, exist for many applications. A single-tasking system can only run one program at a time, while a multi-tasking operating system allows more than one program to be running in concurrency; this is achieved by time-sharing, where the available processor time is divided between multiple processes. These processes are each interrupted in time slices by a task-scheduling subsystem of the operating system. Multi-tasking may be characterized in co-operative types. In preemptive multitasking, the operating system slices the CPU time and dedicates a slot to each of the programs. Unix-like operating systems, such as Solaris and Linux—as well as non-Unix-like, such as AmigaOS—support preemptive multitasking. Cooperative multitasking is achieved by relying on each process to provide time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking.
32-bit versions of both Windows NT and Win9x, used preemptive multi-tasking. Single-user operating systems have no facilities to distinguish users, but may allow multiple programs to run in tandem. A multi-user operating system extends the basic concept of multi-tasking with facilities that identify processes and resources, such as disk space, belonging to multiple users, the system permits multiple users to interact with the system at the same time. Time-sharing operating systems schedule tasks for efficient use of the system and may include accounting software for cost allocation of processor time, mass storage and other resources to multiple users. A distributed operating system manages a group of distinct computers and makes them appear to be a single computer; the development of networked computers that could be linked and communicate with each other gave rise to distributed computing. Distributed computations are carried out on more than one machine; when computers in a group work in cooperation, they form a distributed system.
In an OS, distributed and cloud computing context, templating refers to creating a single virtual machine image as a guest operating system saving it as a tool for multiple running virtual machines. The technique is used both in virtualization and cloud computing management, is common in large server warehouses. Embedded operating systems are designed to be used in embedded computer systems, they are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources, they are compact and efficient by design. Windows CE and Minix 3 are some examples of embedded operating systems. A real-time operating system is an operating system that guarantees to process events or data by a specific moment in time. A real-time operating system may be single- or multi-tasking, but when multitasking, it uses specialized scheduling algorithms so that a deterministic nature of behavior is achieved. An event-driven system switches between tasks based on their priorities or external events while time-sharing operating systems switch tasks based on clock interrupts.
A library operating system is one in which the services that a typical operating system provides, such as networking, are provided in the form of libraries and composed with the application and configuration code to construct a unikernel: a specialized, single address space, machine image that can be deployed to cloud or embedded environments. Early computers were built to perform a series of single tasks, like a calculator. Basic operating system features were developed in the 1950s, such as resident monitor functions that could automatically run different programs in succession to speed up processing. Operating systems did not exist in their more complex forms until the early 1960s. Hardware features were added, that enabled use of runtime libraries and parallel processing; when personal computers became popular in the 1980s, operating systems were made for them similar in concept to those used on larger computers. In the 1940s, the earliest electronic digital systems had no operating systems.
Electronic systems of this time were programmed on rows of mechanical switches or by jumper wires on plug boards. These were special-purpose systems that, for example, generated ballistics tables for the military or controlled the pri
Melbourne is the capital and most populous city of the Australian state of Victoria, the second most populous city in Australia and Oceania. Its name refers to an urban agglomeration of 9,992.5 km2, comprising a metropolitan area with 31 municipalities, is the common name for its city centre. The city occupies much of the coastline of Port Phillip bay and spreads into the hinterlands towards the Dandenong and Macedon ranges, Mornington Peninsula and Yarra Valley, it has a population of 4.9 million, its inhabitants are referred to as "Melburnians". The city was founded on 30 August 1835, in the then-British colony of New South Wales, by free settlers from the colony of Van Diemen’s Land, it was incorporated as a Crown settlement in 1837 and named in honour of the British Prime Minister, William Lamb, 2nd Viscount Melbourne. In 1851, four years after Queen Victoria declared it a city, Melbourne became the capital of the new colony of Victoria. In the wake of the 1850s Victorian gold rush, the city entered a lengthy boom period that, by the late 1880s, had transformed it into one of the world's largest and wealthiest metropolises.
After the federation of Australia in 1901, it served as interim seat of government of the new nation until Canberra became the permanent capital in 1927. Today, it is a leading financial centre in the Asia-Pacific region and ranks 15th in the Global Financial Centres Index; the city is home to many of the best-known cultural institutions in the nation, such as the Melbourne Cricket Ground, the National Gallery of Victoria and the World Heritage-listed Royal Exhibition Building. It is the birthplace of Australian impressionism, Australian rules football, the Australian film and television industries and Australian contemporary dance. More it has been recognised as a UNESCO City of Literature and a global centre for street art, live music and theatre, it is the host city of annual international events such as the Australian Grand Prix, the Australian Open and the Melbourne Cup, has hosted the 1956 Summer Olympics and the 2006 Commonwealth Games. Due to it rating in entertainment and sport, as well as education, health care and development, the EIU ranks it the second most liveable city in the world.
The main airport serving the city is Melbourne Airport, the second busiest in Australia, Australia's busiest seaport the Port of Melbourne. Its main metropolitan rail terminus is Flinders Street station and its main regional rail and road coach terminus is Southern Cross station, it has the most extensive freeway network in Australia and the largest urban tram network in the world. Indigenous Australians have lived in the Melbourne area for an estimated 31,000 to 40,000 years; when European settlers arrived in the 19th-century, under 2,000 hunter-gatherers from three regional tribes—the Wurundjeri and Wathaurong—inhabited the area. It was an important meeting place for the clans of the Kulin nation alliance and a vital source of food and water; the first British settlement in Victoria part of the penal colony of New South Wales, was established by Colonel David Collins in October 1803, at Sullivan Bay, near present-day Sorrento. The following year, due to a perceived lack of resources, these settlers relocated to Van Diemen's Land and founded the city of Hobart.
It would be 30 years. In May and June 1835, John Batman, a leading member of the Port Phillip Association in Van Diemen's Land, explored the Melbourne area, claimed to have negotiated a purchase of 600,000 acres with eight Wurundjeri elders. Batman selected a site on the northern bank of the Yarra River, declaring that "this will be the place for a village" before returning to Van Diemen's Land. In August 1835, another group of Vandemonian settlers arrived in the area and established a settlement at the site of the current Melbourne Immigration Museum. Batman and his group arrived the following month and the two groups agreed to share the settlement known by the native name of Dootigala. Batman's Treaty with the Aborigines was annulled by Richard Bourke, the Governor of New South Wales, with compensation paid to members of the association. In 1836, Bourke declared the city the administrative capital of the Port Phillip District of New South Wales, commissioned the first plan for its urban layout, the Hoddle Grid, in 1837.
Known as Batmania, the settlement was named Melbourne in 1837 after the British Prime Minister, William Lamb, 2nd Viscount Melbourne, whose seat was Melbourne Hall in the market town of Melbourne, Derbyshire. That year, the settlement's general post office opened with that name. Between 1836 and 1842, Victorian Aboriginal groups were dispossessed of their land by European settlers. By January 1844, there were said to be 675 Aborigines resident in squalid camps in Melbourne; the British Colonial Office appointed five Aboriginal Protectors for the Aborigines of Victoria, in 1839, however their work was nullified by a land policy that favoured squatters who took possession of Aboriginal lands. By 1845, fewer than 240 wealthy Europeans held all the pastoral licences issued in Victoria and became a powerful political and economic force in Victoria for generations to come. Letters patent of Queen Victoria, issued on 25 June 1847, declared Melbourne a city. On 1 July 1851, the Port Phillip District separated from New South Wales to become the Colony of Victoria, with Melbourne as its capital.
The discovery of gold in Victoria in mid-1851 sparked a
Los Angeles the City of Los Angeles and known by its initials L. A. is the most populous city in California, the second most populous city in the United States, after New York City, the third most populous city in North America. With an estimated population of four million, Los Angeles is the cultural and commercial center of Southern California; the city is known for its Mediterranean climate, ethnic diversity and the entertainment industry, its sprawling metropolis. Los Angeles is the largest city on the West Coast of North America. Los Angeles is in a large basin bounded by the Pacific Ocean on one side and by mountains as high as 10,000 feet on the other; the city proper, which covers about 469 square miles, is the seat of Los Angeles County, the most populated county in the country. Los Angeles is the principal city of the Los Angeles metropolitan area, the second largest in the United States after that of New York City, with a population of 13.1 million. It is part of the Los Angeles-Long Beach combined statistical area the nation's second most populous area with a 2015 estimated population of 18.7 million.
Los Angeles is one of the most substantial economic engines within the United States, with a diverse economy in a broad range of professional and cultural fields. Los Angeles is famous as the home of Hollywood, a major center of the world entertainment industry. A global city, it has been ranked 6th in the Global Cities Index and 9th in the Global Economic Power Index; the Los Angeles metropolitan area has a gross metropolitan product of $1.044 trillion, making it the third-largest in the world, after the Tokyo and New York metropolitan areas. Los Angeles hosted the 1932 and 1984 Summer Olympics and will host the event for a third time in 2028; the city hosted the Miss Universe pageant twice, in 1990 and 2006, was one of 9 American cities to host the 1994 FIFA men's soccer World Cup and one of 8 to host the 1999 FIFA women's soccer World Cup, hosting the final match for both tournaments. Home to the Chumash and Tongva, Los Angeles was claimed by Juan Rodríguez Cabrillo for Spain in 1542 along with the rest of what would become Alta California.
The city was founded on September 4, 1781, by Spanish governor Felipe de Neve. It became a part of Mexico in 1821 following the Mexican War of Independence. In 1848, at the end of the Mexican–American War, Los Angeles and the rest of California were purchased as part of the Treaty of Guadalupe Hidalgo, becoming part of the United States. Los Angeles was incorporated as a municipality on April 4, 1850, five months before California achieved statehood; the discovery of oil in the 1890s brought rapid growth to the city. The completion of the Los Angeles Aqueduct in 1913, delivering water from Eastern California assured the city's continued rapid growth; the Los Angeles coastal area was settled by the Chumash tribes. A Gabrieleño settlement in the area was called iyáangẚ, meaning "poison oak place". Maritime explorer Juan Rodríguez Cabrillo claimed the area of southern California for the Spanish Empire in 1542 while on an official military exploring expedition moving north along the Pacific coast from earlier colonizing bases of New Spain in Central and South America.
Gaspar de Portolà and Franciscan missionary Juan Crespí, reached the present site of Los Angeles on August 2, 1769. In 1771, Franciscan friar Junípero Serra directed the building of the Mission San Gabriel Arcángel, the first mission in the area. On September 4, 1781, a group of forty-four settlers known as "Los Pobladores" founded the pueblo they called El Pueblo de Nuestra Señora la Reina de los Ángeles,'The Town of Our Lady the Queen of the Angels'; the present-day city has the largest Roman Catholic Archdiocese in the United States. Two-thirds of the Mexican or settlers were mestizo or mulatto, a mixture of African and European ancestry; the settlement remained a small ranch town for decades, but by 1820, the population had increased to about 650 residents. Today, the pueblo is commemorated in the historic district of Los Angeles Pueblo Plaza and Olvera Street, the oldest part of Los Angeles. New Spain achieved its independence from the Spanish Empire in 1821, the pueblo continued as a part of Mexico.
During Mexican rule, Governor Pío Pico made Los Angeles Alta California's regional capital. Mexican rule ended during the Mexican–American War: Americans took control from the Californios after a series of battles, culminating with the signing of the Treaty of Cahuenga on January 13, 1847. Railroads arrived with the completion of the transcontinental Southern Pacific line to Los Angeles in 1876 and the Santa Fe Railroad in 1885. Petroleum was discovered in the city and surrounding area in 1892, by 1923, the discoveries had helped California become the country's largest oil producer, accounting for about one-quarter of the world's petroleum output. By 1900, the population had grown to more than 102,000; the completion of the Los Angeles Aqueduct in 1913, under the supervision of William Mulholland, assured the continued growth of the city. Due to clauses in the city's charter that prevented the City of Los Angeles from selling or providing water from the aqueduct to any area outside its borders, many adjacent city and communities became compelled to annex themselves into Los Angeles.
Los Angeles created the first municipal zoning ordinance in the United States. On September 14, 1908, the Los Angeles City Council promulgated residential and industrial land use zones; the new ordinance established three residential zones of a single type, where industrial uses were