20th-century American businesspeople

Stephen Gary Wozniak (; born August 11, 1950), also known by his nickname "Woz", is an American electrical engineer, computer programmer, philanthropist, and inventor. In 1976, he co-founded Apple Computer with his early business partner Steve Jobs. Through his work at Apple in the 1970s and 1980s, he is widely recognized as one of the most prominent pioneers of the personal computer revolution.In 1975, Wozniak started developing the Apple I: 150  into the computer that launched Apple when he and Jobs first began marketing it the following year. He primarily designed the Apple II, introduced in 1977, known as one of the first highly successful mass-produced microcomputers, while Jobs oversaw the development of its foam-molded plastic case and early Apple employee Rod Holt developed its switching power supply. With human–computer interface expert Jef Raskin, Wozniak had a major influence over the initial development of the original Apple Macintosh concepts from 1979 to 1981, when Jobs took over the project following Wozniak's brief departure from the company due to a traumatic airplane accident. After permanently leaving Apple in 1985, Wozniak founded CL 9 and created the first programmable universal remote, released in 1987. He then pursued several other businesses and philanthropic ventures throughout his career, focusing largely on technology in K–12 schools.As of February 2020, Wozniak has remained an employee of Apple in a ceremonial capacity since stepping down in 1985. In recent years, he has helped fund multiple entrepreneurial efforts dealing in areas such as GPS and telecommunications, flash memory, technology and pop culture conventions, technical education, ecology, satellites and more.

Ronald Ellwin Evans Jr. (November 10, 1933 – April 7, 1990) was an American electrical engineer, aeronautical engineer, officer and aviator in the United States Navy, and NASA astronaut. As Command Module Pilot on Apollo 17 he was one of the 24 astronauts to fly to the Moon, and one of 12 people to fly to the Moon without landing.
Before becoming an astronaut, Evans graduated with a Bachelor of Science degree in electrical engineering from the University of Kansas and joined the U.S. Navy in 1956. After receiving his naval aviator wings, he served as a fighter pilot and flew combat missions during the Vietnam War. In 1964 he received a Master of Science degree in aeronautical engineering from the U.S. Naval Postgraduate School. Achieving the rank of captain, he retired from the Navy in 1976.
Evans was selected as an astronaut by NASA as part of NASA Astronaut Group 5 in 1966 and made his only spaceflight as command Module pilot aboard Apollo 17 in December 1972, the last crewed mission to the Moon, with Commander Gene Cernan and Lunar Module Pilot Harrison Schmitt. During the flight, Evans and five mice orbited the Moon a record 75 times as his two crewmates descended to and explored the surface. He is the last person to orbit the Moon alone and, at 147 hours and 43 minutes, holds the record for the most time spent in lunar orbit. During Apollo 17's return flight to Earth, Evans performed an extravehicular activity (EVA) to retrieve film cassettes from the service module. It was the third "deep space" EVA, and is the spacewalk performed at the greatest distance from any planetary body. As of 2024, it remains one of only three deep space EVAs, all made during the Apollo program's J-missions. It was the final spacewalk of the Apollo program.
In 1975, Evans served as backup Command Module Pilot for the Apollo–Soyuz Test Project mission. He worked on the development of the Space Shuttle before retiring from NASA in March 1977 to become a coal industry executive.

Charles William Duncan Jr. (September 9, 1926 – October 18, 2022) was an American businessman, administrator, and politician best known for serving as U.S. Secretary of Energy in the Cabinet of President Jimmy Carter from 1979 to 1981. He had previously served as Carter's United States Deputy Secretary of Defense during the Iranian Revolution. Earlier, Duncan had run the family business, Duncan Coffee Company of Houston, Texas, for seven years, until the Coca-Cola Company acquired it in 1964. After seven years on the Coke board, Duncan became the corporation's president.

Caitlyn Marie Jenner (born William Bruce Jenner; October 28, 1949; known as Bruce Jenner until 2015) is an American media personality and former Olympic gold medal-winning decathlete.
Jenner played college football for the Graceland Yellowjackets before incurring a knee injury that required surgery. Convinced by Olympic decathlete Jack Parker's coach, L. D. Weldon, to try the decathlon, Jenner had a six-year decathlon career, culminating in winning the men's decathlon event at the 1976 Summer Olympics in Montreal, setting a third successive world record and gaining fame as "an all-American hero". Jenner established a career in television, film, writing, auto racing, business, and as a Playgirl cover model.Jenner has six children with three successive wives – Chrystie Crownover, Linda Thompson, and Kris Jenner – and from 2007 to 2021 appeared on the reality television series Keeping Up with the Kardashians with Kris, their daughters Kendall and Kylie Jenner, as well as Kris's other children from her previous marriage, Kourtney, Kim, Khloé, and Rob Kardashian.
Jenner publicly came out as a trans woman in April 2015, announcing her new name in July of that year. From 2015 to 2016, she starred in the reality television series I Am Cait, which focused on her gender transition. At the time of her coming out, she had been called the most famous trans woman in the world. Jenner is a transgender rights activist, although her views on transgender issues have been criticized by many other LGBTQ+ activists.A member of the Republican Party, Jenner ran in the 2021 California gubernatorial recall election, finishing 13th with one percent of the vote. Six months after the election, Jenner was hired by Fox News as an on-air contributor.

Joe Henry Engle (born August 26, 1932) is an American pilot, aeronautical engineer and former NASA astronaut. He was the commander of two Space Shuttle missions including STS-2 in 1981, the program's second orbital flight. He also flew two flights in the Shuttle program's 1977 Approach and Landing Tests. Engle is one of twelve pilots who flew the North American X-15, an experimental spaceplane jointly operated by the Air Force and NASA, and the last surviving test pilot of the aircraft. After Richard H. Truly died In 2024, Engle is now the last surviving crew member of STS-2.
As an X-15 pilot, Engle made three flights above 50 miles, thus qualifying for astronaut wings under the American convention for the boundary of space. In 1966 he was selected for NASA's 5th Astronaut Group, joining the Apollo program. He was backup Lunar Module Pilot (LMP) for Apollo 14 and originally scheduled as LMP for Apollo 17. However, cancellation of later flights prompted NASA to select geologist-astronaut Harrison Schmitt as LMP, displacing Engle.

Marjorie Merriweather Post (March 15, 1887 – September 12, 1973) was an American businesswoman, socialite, and philanthropist. She was the daughter of C. W. Post and the owner of General Foods Corporation. For much of Marjorie Post's life, she was known as the wealthiest woman in the United States.Post used much of her fortune to collect art, particularly Imperial-era Russian art, much of which is now on display at Hillwood, the museum which was her estate in Washington, D.C. She is also known for her mansion, Mar-a-Lago, in Palm Beach, Florida.

Rennard Cordon Davis (May 23, 1940 – February 2, 2021) was an American anti-war activist who gained prominence in the 1960s. He was one of the Chicago Seven defendants charged for anti-war demonstrations and large-scale protests at the 1968 Democratic National Convention in Chicago. He had a prominent organizational role in the American anti–Vietnam War protest movement of the 1960s.
In the early 1970s, Davis became a follower of Guru Maharaj Ji (Prem Rawat) and his Divine Light Mission. He began to travel as a spiritual lecturer. He also became a venture capitalist, and founded the Foundation for a New Humanity to combine these goals.

Charles Moss Duke Jr. (born October 3, 1935) is an American former astronaut, United States Air Force (USAF) officer and test pilot. As Lunar Module pilot of Apollo 16 in 1972, he became the 10th and youngest person to walk on the Moon, at age 36 years and 201 days.A 1957 graduate of the United States Naval Academy, Duke joined the USAF and completed advanced flight training on the F-86 Sabre at Moody Air Force Base in Georgia, where he was a distinguished graduate. After completion of this training, Duke served three years as a fighter pilot with the 526th Fighter-Interceptor Squadron at Ramstein Air Base in West Germany. After graduating from the Aerospace Research Pilot School in September 1965, he stayed on as an instructor teaching control systems and flying in the F-101 Voodoo, F-104 Starfighter, and T-33 Shooting Star.
In April 1966, Duke was one of nineteen men selected for NASA's fifth astronaut group. In 1969, he was a member of the astronaut support crew for Apollo 10. He served as CAPCOM for Apollo 11, the first crewed landing on the Moon. His distinctive Southern drawl became familiar to audiences around the world, as the voice of Mission Control concerned by the long landing that almost expended all of the Lunar Module Eagle descent stage's propellant. Duke's first words to the Apollo 11 crew on the surface of the Moon were "Roger, Twank...Tranquility, we copy you on the ground. You got a bunch of guys about to turn blue. We're breathing again. Thanks a lot!"
Duke was backup lunar module pilot on Apollo 13. Shortly before the mission, he caught rubella (German measles) from a friend's child and inadvertently exposed the prime crew to the disease. As Ken Mattingly had no natural immunity to the disease, he was replaced as command module pilot by Jack Swigert. Mattingly was reassigned as command module pilot of Duke's flight, Apollo 16. On this mission, Duke and John Young landed at the Descartes Highlands, and conducted three extravehicular activities (EVAs). He served as backup lunar module pilot for Apollo 17. Duke retired from NASA on January 1, 1976.
Following his retirement from NASA, Duke entered the Air Force Reserve and served as a mobilization augmentee to the Commander, USAF Basic Military Training Center, and to the Commander, USAF Recruiting Service. He graduated from the Industrial College of the Armed Forces in 1978. He was promoted to brigadier general in 1979, and retired in June 1986. He has logged 4,147 hours' flying time, of which 3,632 hours were in jet aircraft, and 265 hours were in space, including 21 hours and 38 minutes of EVA.

Edgar Dean "Ed" Mitchell (September 17, 1930 – February 4, 2016) was a United States Navy officer and aviator, test pilot, aeronautical engineer, ufologist, and NASA astronaut. As the Lunar Module Pilot of Apollo 14 in 1971 he spent nine hours working on the lunar surface in the Fra Mauro Highlands region, and was the sixth person to walk on the Moon.
Before becoming an astronaut, Mitchell earned his Bachelor of Science degree in Industrial Management from Carnegie Institute of Technology and entered the United States Navy in 1952. After being commissioned through the Officer Candidate School at Newport, Rhode Island, he served as a Naval Aviator. In 1961, he received his second bachelor's degree, in aeronautical engineering, from the U.S. Naval Postgraduate School and three years later earned his doctorate in Aeronautics and Astronautics from the Massachusetts Institute of Technology (MIT). From 1965 to 1966, he attended the U.S. Air Force Aerospace Research Pilot School and graduated first in his class. During this period, he served as an instructor in advanced mathematics and navigation theory for astronaut candidates.
The legacy of his post-NASA scientific and parapsychology work is carried on through the Institute of Noetic Sciences.

James Benson "Jim" Irwin (March 17, 1930 – August 8, 1991) was an American astronaut, aeronautical engineer, test pilot, and a United States Air Force pilot. He served as Lunar Module pilot for Apollo 15, the fourth human lunar landing. He was the 8th person to walk on the Moon and the first, and youngest, of those astronauts to die.