A campus is traditionally the land on which a college or university and related institutional buildings are situated. A college campus includes libraries, lecture halls, residence halls, student centers or dining halls, park-like settings. A modern campus is a collection of buildings and grounds that belong to a given institution, either academic or non-academic. Examples include the Apple Campus; the word derives from a Latin word for "field" and was first used to describe the large field adjacent Nassau Hall of the College of New Jersey in 1774. The field separated Princeton from the small nearby town; some other American colleges adopted the word to describe individual fields at their own institutions, but "campus" did not yet describe the whole university property. A school might have one space called a campus, one called a field, another called a yard; the tradition of a campus began with the medieval European universities where the students and teachers lived and worked together in a cloistered environment.
The notion of the importance of the setting to academic life migrated to America, early colonial educational institutions were based on the Scottish and English collegiate system. The campus evolved from the cloistered model in Europe to a diverse set of independent styles in the United States. Early colonial colleges were all built in proprietary styles, with some contained in single buildings, such as the campus of Princeton University or arranged in a version of the cloister reflecting American values, such as Harvard's. Both the campus designs and the architecture of colleges throughout the country have evolved in response to trends in the broader world, with most representing several different contemporary and historical styles and arrangements; the meaning expanded to include the whole institutional property during the 20th century, with the old meaning persisting into the 1950s in some places. Sometimes the lands on which company office buildings sit, along with the buildings, are called campuses.
The Microsoft Campus in Redmond, Washington is a good example. Hospitals, airports sometimes use the term to describe the territory of their facilities; the word "campus" has been applied to European universities, although most such institutions are characterized by ownership of individual buildings in urban settings rather than park-like lawns in which buildings are placed. Campus novel Campus university Satellite campus History of college campuses and architecture in the United States The dictionary definition of campus at Wiktionary Media related to Campuses at Wikimedia Commons
Purdue University is a public research university in West Lafayette and the flagship campus of the Purdue University system. The university was founded in 1869 after Lafayette businessman John Purdue donated land and money to establish a college of science and agriculture in his name; the first classes were held on September 1874, with six instructors and 39 students. The main campus in West Lafayette offers more than 200 majors for undergraduates, over 69 masters and doctoral programs, professional degrees in pharmacy and veterinary medicine. In addition, Purdue has more than 900 student organizations. Purdue is a member of the Big Ten Conference and enrolls the second largest student body of any university in Indiana, as well as the fourth largest foreign student population of any university in the United States. In 1865, the Indiana General Assembly voted to take advantage of the Morrill Land-Grant Colleges Act of 1862, began plans to establish an institution with a focus on agriculture and engineering.
Communities throughout the state offered their facilities and money to bid for the location of the new college. Popular proposals included the addition of an agriculture department at Indiana State University or at what is now Butler University. By 1869, Tippecanoe County’s offer included $150,000 from Lafayette business leader and philanthropist John Purdue, $50,000 from the county, 100 acres of land from local residents. On May 6, 1869, the General Assembly established the institution in Tippecanoe County as Purdue University, in the name of the principal benefactor. Classes began at Purdue on September 1874, with six instructors and 39 students. Professor John S. Hougham was Purdue’s first faculty member and served as acting president between the administrations of presidents Shortridge and White. A campus of five buildings was completed by the end of 1874. Purdue issued its first degree, a Bachelor of Science in chemistry, in 1875 and admitted its first female students that fall. Emerson E. White, the university’s president from 1876 to 1883, followed a strict interpretation of the Morrill Act.
Rather than emulate the classical universities, White believed Purdue should be an "industrial college" and devote its resources toward providing a liberal education with an emphasis on science and agriculture. He intended not only to prepare students for industrial work, but to prepare them to be good citizens and family members. Part of White's plan to distinguish Purdue from classical universities included a controversial attempt to ban fraternities; this ban was overturned by the Indiana Supreme Court and led to White's resignation. The next president, James H. Smart, is remembered for his call in 1894 to rebuild the original Heavilon Hall "one brick higher" after it had been destroyed by a fire. By the end of the nineteenth century, the university was organized into schools of agriculture and pharmacy, former U. S. President Benjamin Harrison was serving on the board of trustees. Purdue's engineering laboratories included testing facilities for a locomotive and a Corliss steam engine, one of the most efficient engines of the time.
The School of Agriculture was sharing its research with farmers throughout the state with its cooperative extension services and would undergo a period of growth over the following two decades. Programs in education and home economics were soon established, as well as a short-lived school of medicine. By 1925 Purdue had the largest undergraduate engineering enrollment in the country, a status it would keep for half a century. President Edward C. Elliott oversaw a campus building program between the world wars. Inventor and trustee David E. Ross coordinated several fundraisers, donated lands to the university, was instrumental in establishing the Purdue Research Foundation. Ross's gifts and fundraisers supported such projects as Ross–Ade Stadium, the Memorial Union, a civil engineering surveying camp, Purdue University Airport. Purdue Airport was the country's first university-owned airport and the site of the country's first college-credit flight training courses. Amelia Earhart joined the Purdue faculty in 1935 as a consultant for these flight courses and as a counselor on women's careers.
In 1937, the Purdue Research Foundation provided the funds for the Lockheed Electra 10-E Earhart flew on her attempted round-the-world flight. Every school and department at the university was involved in some type of military research or training during World War II. During a project on radar receivers, Purdue physicists discovered properties of germanium that led to the making of the first transistor; the Army and the Navy conducted training programs at Purdue and more than 17,500 students and alumni served in the armed forces. Purdue set up about a hundred centers throughout Indiana to train skilled workers for defense industries; as veterans returned to the university under the G. I. Bill, first-year classes were taught at some of these sites to alleviate the demand for campus space. Four of these sites are now degree-granting regional campuses of the Purdue University system. Purdue's on-campus housing became racially desegregated in 1947, following pressure from Purdue President Frederick L. Hovde and Indiana Governor Ralph F. Gates.
After the war, Hovde worked to expand the academic opportunities at the university. A decade-long construction program emphasized research. In the late 1950s and early 1960s the university established programs in veterinary medicine, industrial management, nursing, as well as the first computer science department in the United States. Undergraduate humanities courses were strengthened
An overhead projector is a variant of slide projector, used to display images to an audience.. An overhead projector works on the same principle as a 35mm slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed; however some differences are necessitated by the much larger size of the transparencies used, the requirement that the transparency be placed face up. For the latter purpose, the projector includes a mirror just before or after the focusing lens to fold the optical system toward the horizontal; that mirror accomplishes a reversal of the image in order that the image projected onto the screen corresponds to that of the slide as seen by the presenter looking down at it, rather than a mirror image thereof. Therefore, the transparency is placed face up, in contrast with a 35mm slide projector or film projector where the slide's image is non-reversed on the side opposite the focusing lens; the device has sometimes been called a "Belshazzar", after Belshazzar's feast.
Because the focusing lens is much smaller than the transparency, a crucial role is played by the optical condenser which illuminates the transparency. Since this requires a large optical lens but may be of poor optical quality, a Fresnel lens is employed; the Fresnel lens is located at the glass plate on which the transparency is placed, serves to redirect most of the light hitting it into a converging cone toward the focusing lens. Without such a condenser at that point, most of the light would miss the focusing lens. Additionally, mirrors or other condensing elements below the Fresnel lens serve to increase the portion of the light bulb's output which reaches the Fresnel lens in the first place. In order to provide sufficient light on the screen, a high intensity bulb is used which must be fan cooled. Overhead projectors include a manual focusing mechanism which raises and lowers the position of the focusing lens in order to adjust the object distance to focus at the chosen image distance given the fixed focal length of the focusing lens.
This permits a range of projection distances. Increasing the projection distance increases the focusing system's magnification in order to fit the projection screen in use. Increasing the projection distance means that the same amount of light is spread over a larger screen, resulting in a dimmer image. With a change in the projection distance, the focusing must be readjusted for a sharp image. However, the condensing optics is optimized for one particular vertical position of the lens, corresponding to one projection distance. Therefore, when it is focused for a different projection distance, part of the light cone projected by the Fresnel lens towards the focusing lens misses that lens; this has the greatest effect towards the outer edges of the projected image, so that one sees either blue or brown fringing at the edge of the screen when the focus is towards an extreme. Using the projector near its recommended projection distance allows a focusing position where this is avoided and the intensity across the screen is uniform.
The lamp technology of an overhead projector is very simple compared to a modern LCD or DLP video projector. Most overheads use an high-power halogen lamp that may consume up to 750 watts. A high-flow blower is required to keep the bulb from melting due to the heat generated, this blower is on a timer that keeps it running for a period after the light is extinguished. Further, the intense heat accelerates failure of the high intensity lamp burning out in less than 100 hours, requiring replacement. In contrast, a modern LCD or DLP projector uses an arc lamp which has a higher luminous efficacy and lasts for thousands of hours. A drawback of that technology is the warm up time required for arc lamps. Older overhead projectors used a tubular quartz bulb, mounted above a bowl-shaped polished reflector. However, because the lamp was suspended above and outside the reflector, a large amount of light was cast to the sides inside the projector body, wasted, thus requiring a higher power lamp for sufficient screen illumination.
More modern overhead projectors use an integrated lamp and conical reflector assembly, allowing the lamp to be located deep within the reflector and sending a greater portion of its light towards the Fresnel lens. A useful innovation for overhead projectors with integrated lamps/reflectors is the quick-swap dual-lamp control, allowing two lamps to be installed in the projector in movable sockets. If one lamp fails during a presentation the presenter can move a lever to slide the spare into position and continue with the presentation, without needing to open the projection unit or waiting for the failed bulb to cool before replacing it; some ancient projectors like the magic lantern can be regarded as predecessors of the overhead projector. The steganographic mirror came closest to how the o
Electronic mail is a method of exchanging messages between people using electronic devices. Invented by Ray Tomlinson, email first entered limited use in the 1960s and by the mid-1970s had taken the form now recognized as email. Email operates across computer networks, which today is the Internet; some early email systems required the author and the recipient to both be online at the same time, in common with instant messaging. Today's email systems are based on a store-and-forward model. Email servers accept, forward and store messages. Neither the users nor their computers are required to be online simultaneously. An ASCII text-only communications medium, Internet email was extended by Multipurpose Internet Mail Extensions to carry text in other character sets and multimedia content attachments. International email, with internationalized email addresses using UTF-8, has been standardized, but as of 2017 it has not been adopted; the history of modern Internet email services reaches back to the early ARPANET, with standards for encoding email messages published as early as 1973.
An email message sent in the early 1970s looks similar to a basic email sent today. Email had an important role in creating the Internet, the conversion from ARPANET to the Internet in the early 1980s produced the core of the current services; the term electronic mail was used generically for any electronic document transmission. For example, several writers in the early 1970s used the term to describe fax document transmission; as a result, it is difficult to find the first citation for the use of the term with the more specific meaning it has today. Electronic mail has been most called email or e-mail since around 1993, but variations of the spelling have been used: email is the most common form used online, is required by IETF Requests for Comments and working groups and by style guides; this spelling appears in most dictionaries. E-mail is the format that sometimes appears in edited, published American English and British English writing as reflected in the Corpus of Contemporary American English data, but is falling out of favor in some style guides.
Mail was the form used in the original protocol standard, RFC 524. The service is referred to as mail, a single piece of electronic mail is called a message. EMail is a traditional form, used in RFCs for the "Author's Address" and is expressly required "for historical reasons". E-mail is sometimes used, capitalizing the initial E as in similar abbreviations like E-piano, E-guitar, A-bomb, H-bomb. An Internet e-mail consists of an content. Computer-based mail and messaging became possible with the advent of time-sharing computers in the early 1960s, informal methods of using shared files to pass messages were soon expanded into the first mail systems. Most developers of early mainframes and minicomputers developed similar, but incompatible, mail applications. Over time, a complex web of gateways and routing systems linked many of them. Many US universities were part of the ARPANET, which aimed at software portability between its systems; that portability helped make the Simple Mail Transfer Protocol influential.
For a time in the late 1980s and early 1990s, it seemed that either a proprietary commercial system or the X.400 email system, part of the Government Open Systems Interconnection Profile, would predominate. However, once the final restrictions on carrying commercial traffic over the Internet ended in 1995, a combination of factors made the current Internet suite of SMTP, POP3 and IMAP email protocols the standard; the diagram to the right shows a typical sequence of events that takes place when sender Alice transmits a message using a mail user agent addressed to the email address of the recipient. The MUA formats the message in email format and uses the submission protocol, a profile of the Simple Mail Transfer Protocol, to send the message content to the local mail submission agent, in this case smtp.a.org. The MSA determines the destination address provided in the SMTP protocol, in this case firstname.lastname@example.org, a qualified domain address. The part before the @ sign is the local part of the address the username of the recipient, the part after the @ sign is a domain name.
The MSA resolves a domain name to determine the qualified domain name of the mail server in the Domain Name System. The DNS server for the domain b.org responds with any MX records listing the mail exchange servers for that domain, in this case mx.b.org, a message transfer agent server run by the recipient's ISP. smtp.a.org sends the message to mx.b.org using SMTP. This server may need to forward the message to other MTAs before the message reaches the final message delivery agent; the MDA delivers it to the mailbox of user bob. Bob's MUA picks up the message using either the Post Office Protocol or the Internet Message Access Protocol. In addition to this example and complications exist in the email system: Alice or Bob may use a client connected to a corporate email system, such as IBM Lotus Notes or Microsoft Exchange; these systems have their own internal email format and their clients communicate with the email server using a vendor-specific, proprietary protocol. The server sends or receives email via the Internet through the product's Internet mail gateway which does any necessary reformatt
West Lafayette, Indiana
West Lafayette is a city in Wabash Township, Tippecanoe County, United States, about 65 miles northwest of the state capital of Indianapolis and 103 miles southeast of Chicago. West Lafayette is directly across the Wabash River from Lafayette; as of the 2016 census estimate, its population was 45,872. It is home to Purdue University. Augustus Wylie laid out a town in 1836 in the Wabash River floodplain south of the present Levee. Due to regular flooding of the site, Wylie's town was never built; the present city was formed in 1888 by the merger of the adjacent suburban towns of Chauncey and Kingston, located on a bluff across the Wabash River from Lafayette, Indiana. The three towns had been small suburban villages. Kingston was laid out in 1855 by Jesse B. Lutz. Chauncey was platted in 1860 by the Chauncey family of wealthy land speculators. Chauncey and Kingston formed a municipal government in 1866 which selected the name "Chauncey"; the new town of Chauncey remained a small suburban village until Purdue University opened in 1869.
In 1871 Chauncey voted to be annexed by Lafayette because it was unable to provide the infrastructure. Lafayette voted against annexing Chauncey because of the high cost of the many improvements that the village lacked. In May 1888, the town of Chauncey voted to change its name to West Lafayette after a petition signed by 152 electors. By that time, the growth of the university was fueling the growth of the little town; the address of Purdue University was given as "Lafayette, Indiana" until well into the twentieth century. West Lafayette never gained a railroad depot and lagged several years behind Lafayette in the establishment of municipal infrastructure and services. Today, West Lafayette has established itself as a separate city, with independent services and unique neighborhoods distinct from those of its sister city, Lafayette. In November 2013, the City of West Lafayette approved an annexation that placed much of the Purdue University academic campus and residence hall system within the official boundaries of the municipality for the first time.
This expansion included a large section of the US Highway 231 corridor, part of unincorporated Tippecanoe County. Alpha Tau Omega Fraternity House, Jesse Andrew House, Chauncey-Stadium Avenues Historic District, John E. and Catherine E. Christian House, Curtis-Grace House, Happy Hollow Heights Historic District and Dales Historic District, Morton School, The Varsity are listed on the National Register of Historic Places; the city of West Lafayette has its fair share of non-profits, many of whom are committed to preserving the arts. Organizations like the Tippecanoe Arts Federation has a mission to "grow the arts"; the International Center of West Lafayette helps them to achieve this goal by being a member organization of TAF. West Lafayette lies in central Tippecanoe County and overlooks the Wabash River, which borders the city on the east and south. Most of the city lies in eastern Wabash Township, though a small portion on the northeast side extends into Tippecanoe Township. Elevations range from over 500 feet near the river to more than 720 feet in northern parts of the city near U.
S. Route 52. According to the 2010 census, West Lafayette has a total area of 7.63 square miles, of which 7.62 square miles is land and 0.01 square miles is water. As of the census of 2010, there were 29,796 people, 11,945 households, 4,072 families residing in the city; the population density was 3,884.0 inhabitants per square mile. There were 12,591 housing units at an average density of 1,652.4 per square mile. The racial makeup of the city was 65.2% White, 6.8% African American, 0.1% Native American, 17.3% Asian, 0.9% from other races, 2.1% from two or more races. Hispanic or Latino of any race were 7.6% of the population. There were 11,945 households of which 16.0% had children under the age of 18 living with them, 27.2% were married couples living together, 4.4% had a female householder with no husband present, 2.5% had a male householder with no wife present, 65.9% were non-families. 34.2% of all households were made up of individuals and 7.9% had someone living alone, 65 years of age or older.
The average household size was 2.22 and the average family size was 2.92. The median age in the city was 22.8 years. 11.8% of residents were under the age of 18. The gender makeup of the city was 54.2% male and 45.8% female. Following the 2010 census, West Lafayette annexed additional territory including the Purdue University main campus; the census bureau released an updated report to reflect the boundary updates. The census now reports 14,053 households and a population of 42,010; as of the census of 2000, there were 28,778 people, 10,462 households, 3,588 families residing in the city. The population density was 5,219.6 people per square mile. There were 10,819 housing units at an average density of 1,962.3 per square mile. The racial makeup of the city was 77.3% White, 11.3% Asian, 5.4% African American, 0.2% Native American, <0.1% Pacific Islander, 1.2% from other races, 1.6% from two or more races. Hispanic or Latino of any race were 6.2% of the population. There were 10,462 households out of which 14.9% had children under the age of 18 living with them, 27.6% were married couples living together, 4.4% had a female householder with no husband present, 65.7% were n
Dictionaries traditionally define literacy as the ability to read and write. In the modern world, this is one way of interpreting literacy. One more broad interpretation sees literacy as competence in a specific area; the concept of literacy has evolved in meaning. The modern term's meaning has been expanded to include the ability to use language, images and other basic means to understand, gain useful knowledge, solve mathematical problems and use the dominant symbol systems of a culture; the concept of literacy is expanding across OECD countries to include skills to access knowledge through technology and ability to assess complex contexts. A person who travels and resides in a foreign country but is unable to read or write in the language of the host country would be regarded by the locals as illiterate; the key to literacy is reading development, a progression of skills which begins with the ability to understand spoken words and decode written words, which culminates in the deep understanding of text.
Reading development involves a range of complex language-underpinnings including awareness of speech sounds, spelling patterns, word meaning and patterns of word formation, all of which provide a necessary platform for reading fluency and comprehension. Once these skills are acquired, a reader can attain full language literacy, which includes the abilities to apply to printed material critical analysis and synthesis; the inability to do so is called "illiteracy" or "analphabetism". Experts at a United Nations Educational and Cultural Organization meeting have proposed defining literacy as the "ability to identify, interpret, create and compute, using printed and written materials associated with varying contexts"; the experts note: "Literacy involves a continuum of learning in enabling individuals to achieve their goals, to develop their knowledge and potential, to participate in their community and wider society". Literacy emerged with the development of numeracy and computational devices as early as 8000 BCE.
Script developed independently at least five times in human history Mesopotamia, the Indus civilization, lowland Mesoamerica, China. The earliest forms of written communication originated in Serbia, followed by Sumer, located in southern Mesopotamia about 3500-3000 BCE. During this era, literacy was "a functional matter, propelled by the need to manage the new quantities of information and the new type of governance created by trade and large scale production". Writing systems in Mesopotamia first emerged from a recording system in which people used impressed token markings to manage trade and agricultural production; the token system served as a precursor to early cuneiform writing once people began recording information on clay tablets. Proto-cuneiform texts exhibit not only numerical signs, but ideograms depicting objects being counted. Egyptian hieroglyphs emerged from 3300-3100 BCE and depicted royal iconography that emphasized power amongst other elites; the Egyptian hieroglyphic writing system was the first notation system to have phonetic values.
Writing in lowland Mesoamerica was first put into practice by the Olmec and Zapotec civilizations in 900-400 BCE. These civilizations used glyphic writing and bar-and-dot numerical notation systems for purposes related to royal iconography and calendar systems; the earliest written notations in China date back to the Shang Dynasty in 1200 BCE. These systematic notations were found inscribed on bones and recorded sacrifices made, tributes received, animals hunted, which were activities of the elite; these oracle-bone inscriptions were the early ancestors of modern Chinese script and contained logosyllabic script and numerals. Indus script is pictorial and has not been deciphered yet, it may not include abstract signs. It is thought that the script is thought to be logographic; because it has not been deciphered, linguists disagree on whether it is a complete and independent writing system. These examples indicate that early acts of literacy were tied to power and chiefly used for management practices, less than 1% of the population was literate, as it was confined to a small ruling elite.
According to social anthropologist Jack Goody, there are two interpretations that regard the origin of the alphabet. Many classical scholars, such as historian Ignace Gelb, credit the Ancient Greeks for creating the first alphabetic system that used distinctive signs for consonants and vowels, but Goody contests, "The importance of Greek culture of the subsequent history of Western Europe has led to an over-emphasis, by classicists and others, on the addition of specific vowel signs to the set of consonantal ones, developed earlier in Western Asia". Thus, many scholars argue that the ancient Semitic-speaking peoples of northern Canaan invented the consonantal alphabet as early as 1500 BCE. Much of this theory's development is credited to English archeologist Flinders Petrie, who, in 1905, came across a series of Canaanite inscriptions located in the turquoise mines of Serabit el-Khadem. Ten years English Egyptologist Alan Gardiner reasoned that these letters contain an alphabet, as well as references to the Canaanite goddess Asherah.
In 1948, William F. Albright deciphered the text using additional evidence, discovered subsequent to G
World Wide Web
The World Wide Web known as the Web, is an information space where documents and other web resources are identified by Uniform Resource Locators, which may be interlinked by hypertext, are accessible over the Internet. The resources of the WWW may be accessed by users by a software application called a web browser. English scientist Tim Berners-Lee invented the World Wide Web in 1989, he wrote the first web browser in 1990 while employed at CERN near Switzerland. The browser was released outside CERN in 1991, first to other research institutions starting in January 1991 and to the general public in August 1991; the World Wide Web has been central to the development of the Information Age and is the primary tool billions of people use to interact on the Internet. Web resources may be any type of downloaded media, but web pages are hypertext media that have been formatted in Hypertext Markup Language; such formatting allows for embedded hyperlinks that contain URLs and permit users to navigate to other web resources.
In addition to text, web pages may contain images, video and software components that are rendered in the user's web browser as coherent pages of multimedia content. Multiple web resources with a common theme, a common domain name, or both, make up a website. Websites are stored in computers that are running a program called a web server that responds to requests made over the Internet from web browsers running on a user's computer. Website content can be provided by a publisher, or interactively where users contribute content or the content depends upon the users or their actions. Websites may be provided for a myriad of informative, commercial, governmental, or non-governmental reasons. Tim Berners-Lee's vision of a global hyperlinked information system became a possibility by the second half of the 1980s. By 1985, the global Internet began to proliferate in Europe and the Domain Name System came into being. In 1988 the first direct IP connection between Europe and North America was made and Berners-Lee began to discuss the possibility of a web-like system at CERN.
While working at CERN, Berners-Lee became frustrated with the inefficiencies and difficulties posed by finding information stored on different computers. On March 12, 1989, he submitted a memorandum, titled "Information Management: A Proposal", to the management at CERN for a system called "Mesh" that referenced ENQUIRE, a database and software project he had built in 1980, which used the term "web" and described a more elaborate information management system based on links embedded as text: "Imagine the references in this document all being associated with the network address of the thing to which they referred, so that while reading this document, you could skip to them with a click of the mouse." Such a system, he explained, could be referred to using one of the existing meanings of the word hypertext, a term that he says was coined in the 1950s. There is no reason, the proposal continues, why such hypertext links could not encompass multimedia documents including graphics and video, so that Berners-Lee goes on to use the term hypermedia.
With help from his colleague and fellow hypertext enthusiast Robert Cailliau he published a more formal proposal on 12 November 1990 to build a "Hypertext project" called "WorldWideWeb" as a "web" of "hypertext documents" to be viewed by "browsers" using a client–server architecture. At this point HTML and HTTP had been in development for about two months and the first Web server was about a month from completing its first successful test; this proposal estimated that a read-only web would be developed within three months and that it would take six months to achieve "the creation of new links and new material by readers, authorship becomes universal" as well as "the automatic notification of a reader when new material of interest to him/her has become available". While the read-only goal was met, accessible authorship of web content took longer to mature, with the wiki concept, WebDAV, Web 2.0 and RSS/Atom. The proposal was modelled after the SGML reader Dynatext by Electronic Book Technology, a spin-off from the Institute for Research in Information and Scholarship at Brown University.
The Dynatext system, licensed by CERN, was a key player in the extension of SGML ISO 8879:1986 to Hypermedia within HyTime, but it was considered too expensive and had an inappropriate licensing policy for use in the general high energy physics community, namely a fee for each document and each document alteration. A NeXT Computer was used by Berners-Lee as the world's first web server and to write the first web browser, WorldWideWeb, in 1990. By Christmas 1990, Berners-Lee had built all the tools necessary for a working Web: the first web browser and the first web server; the first web site, which described the project itself, was published on 20 December 1990. The first web page may be lost, but Paul Jones of UNC-Chapel Hill in North Carolina announced in May 2013 that Berners-Lee gave him what he says is the oldest known web page during a 1991 visit to UNC. Jones stored it on his NeXT computer. On 6 August 1991, Berners-Lee published a short summary of the World Wide Web project on the newsgroup alt.hypertext.
This date is sometimes confused with the public availability of the first web servers, which had occurred months earlier. As another example of such confusion, several news media reported that the first photo on the Web was published by Berners-Lee in 1992, an image of the CERN house band Les Horribles Cernettes taken by Silvano de Gennaro.