Hypertext Transfer Protocol

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web.

Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text. HTTP is the protocol to exchange or transfer hypertext.

The standards development of HTTP was coordinated by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), culminating in the publication of a series of Requests for Comments (RFCs). The first definition of HTTP/1.1, the version of HTTP in common use, occurred in RFC 2068 in 1997, although this was obsoleted by RFC 2616 in 1999.

Technical overview

HTTP functions as a request–response protocol in the client–server computing model. A web browser, for example, may be the client and an application running on a computer hosting a web site may be the server. The client submits an HTTP request message to the server. The server, which provides resources such as HTML files and other content, or performs other functions on behalf of the client, returns a response message to the client. The response contains completion status information about the request and may also contain requested content in its message body.

The Weeknd

Abęl Makkonen Tesfaye (born 16 February 1990), known professionally by his stage name The Weeknd (pronounced "the weekend"), is a Canadian singer, songwriter and record producer. In late 2010, Tesfaye anonymously uploaded several songs to YouTube under the name "The Weeknd". He released three nine-track mixtapes throughout 2011: House of Balloons, Thursday and Echoes of Silence, which were critically acclaimed. The following year, he released a compilation album Trilogy, thirty tracks consisting of remastered versions of the mixtape material and three additional songs. It was released under Republic Records and his own label XO.

In 2013, he released his debut studio album Kiss Land, which was supported by the singles "Kiss Land" and "Live For". His second album, Beauty Behind the Madness, which became his first number one album on the Billboard 200, included the top-five single "Earned It" and produced the number-one singles "The Hills" and "Can't Feel My Face". The songs have simultaneously held the top three spots on the Billboard Hot R&B Songs chart, making him the first artist in history to achieve this.

Katy Perry

Katheryn Elizabeth "Katy" Hudson (born October 25, 1984), known professionally as Katy Perry, is an American singer, songwriter, and actress. After singing in church during her childhood, she pursued a career in gospel music as a teenager. Perry signed with Red Hill Records and released her debut studio album Katy Hudson in 2001, which was commercially unsuccessful. She moved to Los Angeles the following year to venture into secular music after Red Hill ceased operations. After being dropped by The Island Def Jam Music Group and Columbia Records, Perry signed a recording contract with Capitol Records in April 2007.

Perry rose to fame in 2008 with the release of the singles "I Kissed a Girl" – which sparked controversy for its homosexual themes – and "Hot n Cold" from her second album, a pop rock record titled One of the Boys. Her third album, Teenage Dream (2010), ventured into disco, and contained the U.S. Billboard Hot 100 chart-topping singles "California Gurls", "Teenage Dream", "Firework", "E.T.", and "Last Friday Night (T.G.I.F.)" as well as the number-three single "The One That Got Away". The album became the first by a female artist to produce five number-one Billboard Hot 100 songs, and the second overall after Michael Jackson's album Bad. In March 2012, she reissued the album as Teenage Dream: The Complete Confection, which produced the songs "Part of Me" and "Wide Awake".

Randy Pausch

Randolph Frederick "Randy" Pausch (October 23, 1960 – July 25, 2008) was an American professor of computer science, human–computer interaction, and design at Carnegie Mellon University (CMU) in Pittsburgh, Pennsylvania.

Pausch learned that he had pancreatic cancer in September 2006, and in August 2007 he was given a terminal diagnosis: "3 to 6 months of good health left". He gave an upbeat lecture titled "The Last Lecture: Really Achieving Your Childhood Dreams" on September 18, 2007, at Carnegie Mellon, which became a popular YouTube video and led to other media appearances. He then co-authored a book called The Last Lecture on the same theme, which became a New York Times best-seller.

Pausch died of complications from pancreatic cancer on July 25, 2008.

Early life

Pausch was born in Baltimore, Maryland, and grew up in Columbia, Maryland. After graduating from Oakland Mills High School in Columbia, Pausch received his bachelor's degree in computer science from Brown University in May 1982 and his Ph.D. in computer science from Carnegie Mellon University in August 1988. While completing his doctoral studies, Pausch was briefly employed at Xerox Palo Alto Research Center and Adobe Systems.

Alicia Keys

Alicia Augello Cook (born January 25, 1981), known by the pseudonym Alicia Keys, is an American singer, songwriter, record producer, and actress. Keys released her debut album with J Records, having had previous record deals first with Columbia and then Arista Records. Keys' debut album, Songs in A Minor, was a commercial success, selling over 12 million copies worldwide. She became the best-selling new artist and best-selling R&B artist of 2001. The album earned Keys five Grammy Awards in 2002, including Best New Artist and Song of the Year for "Fallin'" becoming the second American recording artist to win five Grammys in one night. Her second studio album, The Diary of Alicia Keys, was released in 2003 and was also another success worldwide, selling eight million copies. The album garnered her an additional four Grammy Awards in 2005. Later that year, she released her first live album, Unplugged, which debuted at number one in the United States. She became the first female to have an MTV Unplugged album to debut at number one and the highest since Nirvana in 1994.