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Jean Bartik

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Jean Bartik
Jean Bartik.jpg
Born Betty Jean Jennings
(1924-12-27)December 27, 1924
Gentry County, Missouri
Died March 23, 2011(2011-03-23) (aged 86)
Nationality American
Alma mater Northwest Missouri State Teachers College (honorary D. Sc., 2002), University of Pennsylvania (B.S., 1945; Master's 1967)
Spouse(s) William Bartik
Awards Computer Pioneer Award (2008)
Engineering career
Employer(s) University of Pennsylvania,
Eckert–Mauchly Computer Corporation,
Auerbach Publishers,
Data Decisions
Projects ENIAC
Awards WITI Hall of Fame
Computer History Museum Fellow (2008)

Jean Jennings Bartik (December 27, 1924 – March 23, 2011) was one of the original programmers for the ENIAC computer. She studied mathematics in school then began work at the University of Pennsylvania, first manually calculating ballistics trajectories, then using ENIAC to do so. She and her colleagues developed and codified many of the fundamentals of programming while working on the ENIAC, since it was the first computer of its kind. After her work on ENIAC, Bartik went on to work on BINAC and UNIVAC, and spent time at a variety of technical companies as a writer, manager, engineer and programmer. She spent her later years as a real estate agent and died in 2011 from congestive heart failure complications.

Early life and education[edit]

Born Betty Jean Jennings in Gentry County, Missouri, in 1924, she was the sixth of seven children. Her father, William Smith Jennings (1893-1971) was from Alanthus Grove, where he was a schoolteacher as well as a farmer. Her mother, Lula May Spainhower (1887-1988) was from Alanthus. Jennings had three older brothers, William (January 10, 1915) Robert (March 15, 1918); and Raymond (January 23, 1922); two older sisters, Emma (August 11, 1916) and Lulu (August 22, 1919), and one younger sister, Mable (December 15, 1928).[1][2][3]

In her childhood, she would ride on horseback to visit her grandmother, who bought the young girl a newspaper to read every day and became a role model for the rest of her life. She began her education at a local one-room school, and gained local attention for her softball skill. In order to attend high school, she lived with her older sister in the neighboring town, where the school was located, and then began to drive every day despite being only 14. She graduated from Stanberry High School in 1941, aged 16.[4][5][6]

She attended Northwest Missouri State Teachers College now known Northwest Missouri State University, majoring in mathematics with a minor in English and graduating in 1945. Jennings was awarded the only mathematics degree in her class.[1] Although she had originally intended to study journalism, she decided to change to mathematics because she had a bad relationship with her adviser.[7] Later in her life, she earned a master's degree in English at the University of Pennsylvania in 1967 and was awarded an honorary doctorate degree from Northwest Missouri State University in 2002.[1][8]


Programmers Betty Jean Jennings (left) and Fran Bilas (right) operate the ENIAC's main control panel.

In 1945, the Army was recruiting mathematicians from universities to aid in the war effort; despite a warning by her adviser that she would be just "a cog in a wheel" with the Army, and despite encouragement to become a mathematics teacher instead, Bartik known as Betty Jennings at the time decided to become a human computer. Her calculus professor, encouraged Bartik to take the job at University of Pennsylvania because they had a differential analyzer.[7][6]

She applied to both IBM and the University of Pennsylvania at the age of 20. Although rejected by IBM, Jennings was hired by the University of Pennsylvania to work for Army Ordnance at Aberdeen Proving Ground, calculating ballistics trajectories by hand.[4][9] While working there, Bartik met her husband, William Bartik, who was an engineer working on a Pentagon project at the University of Pennsylvania. They married in December 1946.[7][9]

When the Electronic Numeric Integrator and Computer (ENIAC) was developed for the purpose of calculating the ballistic trajectories human computers like Bartik had been doing by hand, she applied to become a part of the project and was eventually selected to be one of its first programmers. Bartik was asked to set up problems for the ENIAC without being taught any techniques.[10] Six women, including Jean Jennings Bartik, Betty Holberton, Marlyn Wescoff, Kathleen McNulty, Ruth Teitelbaum, and Frances Spence, were chosen to be the main programmers for the ENIAC.[6] Many other women who are often unrecognized contributed to the ENIAC during a period of wartime male labor shortage.[11] Bartik, who became the co-lead programmer (with Betty Holberton), and the other four original programmers became extremely adept at running the ENIAC; with no manual to rely on, the group reviewed diagrams of the device, interviewed the engineers who had built it, and used this information to teach themselves the skills they needed.[7] Initially, they were not allowed to see the ENIAC's hardware at all since it was still classified and they had not received security clearance; they had to learn how to program the machine solely through studying schematic diagrams.[12] The six-woman team was also not initially given space to work together, so they found places to work where they could, in abandoned classrooms and fraternity houses.[7]

While the six women worked on ENIAC, they developed subroutines, nesting, and other fundamental programming techniques, and arguably invented the discipline of programming digital computers.[4][9][13] Bartik and the other ENIAC female programmers learned to physically modify the machine, moving switches and rerouting cables, in order to program it.[12][13] In addition to performing the original ballistic trajectories they were hired to compute, the six female programmers soon became operators on the Los Alamos nuclear calculations, and generally expanded the programming repertoire of the machine.[7] Bartik's programming partner on the important trajectory program for the military that would prove that the ENIAC worked to specification was Betty Holberton known at the time as Betty Snyder. Bartik and Holberton's program was chosen to introduce the ENIAC to the public and larger scientific community. That demonstration occurred on February 15, 1946 and was a tremendous success. The ENIAC proved that it operated faster than the Mark I, a well known electromechanical machine at Harvard, and also showed that the work that would take a "human computer" 40 hours to complete could be done in 20 seconds.[8][6]

Bartik described the first public demonstration of the ENIAC in 1946:

The day ENIAC was introduced to the world was one of the most exciting days of my life. The demonstration was fabulous. ENIAC calculated the trajectory faster than it took the bullet to travel. We handed out copies of the calculations as they were run. ENIAC was 1,000 times faster than any machine that existed prior to that time. With its flashing lights, it also was an impressive machine illustrating graphically how fast it was actually computing.[7]

The public demonstration was a success, but most of the congratulations on its turnout were given to its engineers, Mauchly and Eckert.[6]

Bartik was later asked to form and lead a group of programmers to convert the ENIAC into a stored program computer, working closely with John Von Neumann, Dick Clippinger and Adele Goldstine.[8]

Bartik converted the ENIAC into a stored program computer by March 1948.[8][6] As head of this process, Bartik was charged with the conversion that allowed the ENIAC to be turned into rudimentary stored program computer to assist with Clippinger's wind tunnel programs, which allowed the ENIAC to operate more quickly, efficiently, and accurately.[6] Letters between Bartik and Adele Goldstine were discovered by authors Thomas Haigh and Mark Priestley during the time of the project, as well as, the fact that much of the 60-order Code was in Bartik's handwriting.[14]

After the end of the war, Bartik went on to work with the ENIAC designers John Eckert and John Mauchly,[10] and helped them develop the BINAC and UNIVAC I computers.[4][9] BINAC was the first computer to use magnetic tape instead of punch cards to store data and the first computer to utilize the twin unit concept. The BINAC, which was the first stored program computer hardware wise, worked successfully. BINAC was purchased by Northrop Aircraft to guide the Snark missile, but the BINAC proved to be too large for their purposes. However, according to a Northrop Aircraft programmer, despite claims that the BINAC didn't work once it was moved to Northrop Aircraft were erroneous and the BINAC was working well into the mid-1950s.[6] Besides, BINAC, Jean's more important work involved her responsibilities in designing the UNIVAC's logic circuits among other UNIVAC programming and design tasks.[4] Bartik also co-programmed with her life-long friend Betty Holberton the first generative programming system (SORT/MERGE) for a computer.[5] Recalling her time working with Eckert and Mauchly on these projects, she described their close group of computer engineers as a "technical Camelot."[9][6][15][16][6][8]

In the early 1950s, once the Eckert-Mauchly Corporation was sold to Remington Rand Bartik went on to help train on how to program and use the UNIVAC for the first six UNIVACs sold, including the programmers at the United States Census Bureau (first UNIVAC sold) and Atomic Energy Commission.[6] Later, Bartik moved to Philadelphia when her husband, William "Bill" Bartik,took a job with Remington Rand. Unfortunately, due to a company policy at the time about husbands and wives working together, Jean Bartik, was asked to resign from the company. Between 1951 and 1954, prior to her first child's birth, Jean did mostly free-lance programming assignments for John Mauchly and was a helpmate to her husband. Once her son was born, Jean walked away from her career in computing to concentrate on raising a family, during which time she had two other children with her husband.[4][6][15][16][8][5]

Even though Bartik played an integral part in developing ENIAC, her work at University of Pennsylvania and on the ENIAC was completely hidden until her pioneering work was documented by columnist Tom Petzinger in several articles for the Wall Street Journal on Bartik and Holberton.[6][15][16][8][6]Later, a film called Top Secret Rosies: The Female "Computers" of WWII helped shed even more light on Bartik's pioneering work in computing along with Kathy Kleiman's ENIAC Programmers Project.

Later life[edit]

After getting her Masters degree from the University of Pennsylvania in 1967 and making the decision to divorce her husband, Bartik joined the Auerbach Corporation writing and editing technical reports on minicomputers.[4][7] It was at this time that Jean began going by the name "Jean" rather than "Betty" which is what she had been known as during her ENIAC, UNIVAC and Remington-Rand years. The name change was the result of wanting to be taken more seriously by her male co-workers. Bartik remained with Auerbach for eight years, then moved among positions with a variety of other companies for the rest of her career as a manager, writer, and engineer.[4] Jean Bartik and William Bartik divorced by 1968.[9] Bartik ultimately retired from the computing industry in 1986 when her final employer, Data Decisions, closed down; Bartik spent the following 25 years as a real estate agent.

Starting in 1996, once the importance of their role in the development of computing was re-discovered, Bartk along with Betty Holberton and Bartik's other friend of over 60 years Kay Mauchly (ENIAC programmer and wife of ENIAC co-inventor John Mauchly) began to finally receive the acknowledgement and honors for their pioneering work in the early field of computing. Bartik and Kay Mauchly became invited speakers both at home and abroad to share their experiences working with the ENIAC,BINAC and UNIVAC. Bartik especially went on to receive many honors and awards for her pioneering role programming the ENIAC, BINAC and UNIVAC, the latter of which helped to launch the commercial computer industry, and for turning the ENIAC into the world's first stored program computer. The Jean Jennings Bartik Computing Museum was opened in 2002 on the campus of Northwest Missouri State University, Bartik's alma mater, in her honoror. Bartik was inducted into the Computer History Museum's distinguished Hall of Fellows along with Linus Torvalds, creator and principal developer of the Linux kernel and Robert Metcalf, father of Ethernet, in 2008. Bartik wrote her autobiography "Pioneer Programmer: Jean Jennings Bartik and the Computer that Changed the World" prior to her death in 2011 with the help of long-time colleagues, Dr. Jon T. Rickman and Kim D. Todd. The autobiography was published in 2013 by Truman State Press to positive reviews. Bartik died from congestive heart failure in a Poughkeepsie, New York nursing home on March 23, 2011. She was 86.[6][15][16][6][8][5]

Jean wrote that one of the best pieces of advice she ever received was: "Don't ever let anyone tell you that you can't do something because they think you can't. You can do anything, achieve anything, if you think you can and you educate yourself to succeed."[1]

Jean wanted to encourage girls and women to follow their dreams and she said the following: "If my life has proved anything, it is that women (and girls) should never be afraid to take risks and try new things."[8]

Awards and honors[edit]

The Jean Jennings Bartik Computing Museum at Northwest Missouri State University in Maryville, Missouri is dedicated to the history of computing and Bartik's career.[20]

Content-management framework Drupal's default theme, Bartik, is named in honor of her.[21]

See also[edit]


  1. ^ a b c "Jean Bartik". Computer History Museum. Archived from the original on March 11, 2016. Retrieved October 31, 2016. 
  2. ^ "Bartik biography". Retrieved 2017-11-19. 
  3. ^ "Oral History: Jean Bartik" (PDF). 
  4. ^ a b c d e f g h i O'Connor, J. J.; Robertson, E.F. "Jean Bartik biography". Retrieved 2016-06-26. 
  5. ^ a b c d 1967-, Reed, Jennifer,. Computer scientist Jean Bartik. Minneapolis. ISBN 1512413100. OCLC 938387267. 
  6. ^ a b c d e f g h i j k l m n o p Bartik, Jean Jennings (2013). Rickman, Jon T.; Todd, Kim D., eds. Pioneer programmer: Jean Jennings Bartik and the computer that changed the world. Kirksville, Missouri: Truman State University Press. ISBN 9781612480862. OCLC 854828754. 
  7. ^ a b c d e f g h Barkley Fritz, W. (1996). "The Women of ENIAC". IEEE Annals of the History of Computing. 18 (3): 13–28. doi:10.1109/85.511940. 
  8. ^ a b c d e f g h i D.,, Todd, Kim. Jean Jennings Bartik computer pioneer. Kirksville, Missouri. ISBN 1612481450. OCLC 935185503. 
  9. ^ a b c d e f Lohr, Steve (2011-04-07). "Jean Bartik, Software Pioneer, Dies at 86". The New York Times. Retrieved 2011-04-08. 
  10. ^ a b Beyer, Kurt (2009). Grace Hopper and the Invention of the Information Age. MIT Press. pp. 178–181. ISBN 978-0-262-01310-9. 
  11. ^ Janet., Abbate, (2012). Recoding gender : women's changing participation in computing. Cambridge, Mass.: MIT Press. ISBN 9780262018067. OCLC 813929041. 
  12. ^ a b c "ENIAC Programmers". WITI Hall of Fame. Women in Technology International (WITI). Retrieved 22 April 2014. 
  13. ^ a b Walter., Isaacson,. The innovators : how a group of hackers, geniuses, and geeks created the digital revolution (First Simon & Schuster hardcover edition ed.). New York. ISBN 1476708703. OCLC 876012030. 
  14. ^ CRISPIN., HAIGH, THOMAS. PRIESTLEY, MARK. ROPE, (2018). ENIAC IN ACTION : making and remaking the modern computer. [S.l.]: MIT PRESS. ISBN 0262535173. OCLC 1002291949. 
  15. ^ a b c d Cite error: The named reference Biography was invoked but never defined (see the help page).
  16. ^ a b c d Reed, Jennifer. Computer Scientist Jean Bartik (STEM Trailblazer Bios). Lerner Publications. ISBN 1512413100. 
  17. ^ "Jean Bartik". Computer History Museum. Archived from the original on 2016-03-11. Retrieved 2013-05-23. 
  18. ^ Kleiman, Kathy. "Jean Bartik: the untold story of a remarkable ENIAC programmer". Official Google Blog. Retrieved 2016-06-27. 
  19. ^ a b "Betty Jean Jennings Bartik". IEEE Computer Society Awards. IEEE Computer Society. Retrieved 22 April 2014. 
  20. ^ University, Northwest Missouri State. "Jean Jennings Bartik Computing Museum | Special Collections & Archives | Northwest". Retrieved 2016-06-27. 
  21. ^ "Bartik |". Retrieved 2015-11-16. 
  • [Pioneer Programmer: Jean Jennings Bartik and the Computer that Changed the World", Jean Jennings Bartik autobiography, edited by Dr. Jon Rickman and Kim D. Todd, Truman State Press, 2013.]
  • [Jean Jennings Bartik: Computer Pioneer, Kim D. Todd, 2015, Notable Missourians, Truman State Press.]
  • [Computer Scientist Jean Barik (STEM Trailblazer Bios), 2016, Lerner Classroom.]
  • [The Innovators: How a Group of Hackers, Geniuses, and Geeks Created the Digital Revolution, Walter Isaacson, 2015, Simon & Schuster.]
  • [ENIAC in Action: Making and Remaking the Modern Computer (History of Computing), Thomas Haigh, Mark Priestly and Crispin Rope, 2018, The MIT Pres.}

External links[edit]

External video
Jean Bartik and the ENIAC Women, "Computer History Museum", November 10, 2010
Jean Jennings Bartik - ENIAC Pioneer, Computer History Museum, October 22, 2008