Speech is the vocalized form of human communication. It is based upon the syntactic combination of lexicals and names that are drawn from very large (usually to about 10,000 different words) vocabularies. Each spoken word is created out of the phonetic combination of a limited set of vowel and consonant speech sound units. These vocabularies, the syntax which structures them, and their set of speech sound units differ, creating the existence of many thousands of different types of mutually unintelligible human languages. Most human speakers (polyglots) are able to communicate in two or more of them. The vocal abilities that enable humans to produce speech also provide humans with the ability to sing.

A gestural form of human communication exists for the deaf in the form of sign language. Speech in some cultures has become the basis of a written language, often one that differs in its vocabulary, syntax and phonetics from its associated spoken one, a situation called diglossia. Speech in addition to its use in communication, it is suggested by some psychologists such as Vygotsky is internally used by mental processes to enhance and organize cognition in the form of an interior monologue.

Oprah Winfrey (born Orpah Gail Winfrey; January 29, 1954) is an American media proprietor, talk show host, actress, producer, and philanthropist. Winfrey is best known for her self-titled, multi-award-winning talk show, which has become the highest-rated program of its kind in history and was nationally syndicated from 1986 to 2011. She has been ranked the richest African-American of the 20th century, the greatest black philanthropist in American history, and was for a time the world's only black billionaire. She is also, according to some assessments, the most influential woman in the world.

Winfrey was born into poverty in rural Mississippi to a teenage single mother and later raised in an inner-city Milwaukee neighborhood. She experienced considerable hardship during her childhood, claiming to be raped at age nine and becoming pregnant at 14; her son died in infancy. Sent to live with the man she calls her father, a barber in Tennessee, Winfrey landed a job in radio while still in high school and began co-anchoring the local evening news at the age of 19. Her emotional ad-lib delivery eventually got her transferred to the daytime-talk-show arena, and after boosting a third-rated local Chicago talk show to first place, she launched her own production company and became internationally syndicated.

Sean John Combs (born November 4, 1969), also known by his stage names Diddy and P. Diddy, is an American rapper, singer, record producer, actor, and entrepreneur. He was originally known as Puff Daddy and then as P. Diddy (Puff and Puffy have been used as nicknames, but never as recording names). In August 2005, he changed his stage name to simply "Diddy", but continues to use the name P. Diddy in the UK as the result of a lawsuit. He has won three Grammy Awards and two MTV Video Music Awards, and his clothing line earned a Council of Fashion Designers of America award. He formed and recorded with the group Diddy – Dirty Money.

Combs was born in Harlem and grew up in Mount Vernon, New York. He worked as a talent director at Uptown Records and then founded Bad Boy Records in 1993. His business interests—under the umbrella of Bad Boy Entertainment Worldwide—include Bad Boy Records, the clothing lines Sean John and "Sean by Sean Combs", a movie production company, and two restaurants. He has taken the roles of recording executive, performer, producer of MTV's Making the Band, writer, arranger, clothing designer, and Broadway actor. In 2011, Forbes estimated his net worth at $500 million, making him the richest figure in hip hop.

Steven Paul "Steve" Jobs (/ˈdʒɒbz/; February 24, 1955 – October 5, 2011) was an American businessman, designer and inventor. He is best known as the co-founder, chairman, and chief executive officer of Apple Inc. Through Apple, he was widely recognized as a charismatic pioneer of the personal computer revolution and for his influential career in the computer and consumer electronics fields. Jobs also co-founded and served as chief executive of Pixar Animation Studios; he became a member of the board of directors of The Walt Disney Company in 2006, when Disney acquired Pixar.

In the late 1970s, Apple co-founder Steve Wozniak engineered one of the first commercially successful lines of personal computers, the Apple II series. Jobs was among the first to see the commercial potential of Xerox PARC's mouse-driven graphical user interface, which led to the creation of the Apple Lisa and, one year later, the Macintosh. During this period he also led efforts that would begin the desktop publishing revolution, notably through the introduction of the LaserWriter and the associated PageMaker software.

Kevin Wayne Durant (born September 29, 1988) is an American professional basketball forward with the Oklahoma City Thunder of the National Basketball Association (NBA). A 6'9" small forward, Durant was the consensus 2007 National College Player of the Year and the 2006–2007 Big 12 Player of the Year, amongst other awards. After a standout freshman season at the University of Texas, Durant opted to enter the NBA Draft, where he was selected second overall by the Seattle SuperSonics. There he went on to win the NBA Rookie of the Year Award after his debut season. In 2007, Durant signed an endorsement contract with Nike. In the 2009–10 season Durant led the NBA in scoring and became the youngest player ever to win the NBA scoring title. He would later be named to the 2010 All NBA First Team.