A History of Trailblazing Women in STEM
These 10 women overcame myriad obstacles to make groundbreaking contributions to STEM fields.
March 18, 2023

Terry Hancock
Widely recognized as the world's first computer programmer, Ada Lovelace collaborated with Charles Babbage, designer of the first mechanical computer. Lovelace authored a detailed set of instructions for a proposed computing machine that would have been capable of performing complex mathematical calculations.
Her work on the so-called "Analytical Engine," as it was called, included the development of an algorithm representing essentially the first computer program. While her contributions to the field of computer science were largely overlooked during her lifetime, she is now recognized as a pioneer of modern computing.
The Polish-born physicist and chemist made groundbreaking contributions to the fields of radioactivity and nuclear physics. Marie Curie was the first woman to win a Nobel Prize, and the first person to win Nobel Prizes in different fields of science (physics in 1903 and chemistry in 1911). Her pioneering work included the discovery of two new elements, polonium and radium, and the development of techniques for isolating radioactive isotopes.
Katherine Johnson was a mathematician and physicist who played a key role in the early years of NASA's space program as part of the team calculating the trajectories for the first human spaceflight by Alan Shepard in 1961. Johnson's precise calculations and expertise in celestial navigation were critical to the success of these missions, and she continued to work on spaceflight projects throughout her career at NASA.
Despite facing discrimination and segregation as a Black woman in a male-dominated field, Johnson's contributions to the space program helped pave the way for future generations of women and people of color in science and technology.
Annie Easley was one of the first African-American women to work as a computer scientist at NASA, and she made important contributions to the development of software for rocket propulsion systems and energy conversion systems.
She was also involved in research on alternative energy sources such as wind and solar power, and she worked to improve access to science and technology education for underprivileged children. Easley's work helped pave the way for future generations of women and underrepresented minorities in STEM fields.
Often referred to as the "Mother of COBOL," or Common Business Oriented Language, Grace Hopper was a computer scientist and naval officer. She was instrumental in authoring the COBOL programming language designed for business applications, which became one of the most widely used programming languages in the world.
She also played a key role in the development of the first computers, including the Harvard Mark I and UNIVAC I, and is credited with coining the term "debugging" after removing a moth from a computer.
The Austrian born actress, better known for her silver screen allure, also made important contributions to the field of wireless communication, working with composer George Antheil to develop a "frequency hopping" system during World War II that could be used to prevent enemy interception of radio-controlled torpedoes.
Although the pioneering system was not immediately implemented during the war, it was later used as the basis for modern technologies such as Bluetooth, WiFi, and GPS.
As a computer scientist, Adele Goldberg worked at the Xerox Palo Alto Research Center (PARC) in the 1970s, where she was one of the developers of the Smalltalk-80 programming language and the Smalltalk-80 user interface. These innovations became influential in the development of object-oriented programming and graphical user interfaces (GUIs), which have become standard features in modern computing.
Goldberg's achievements also include lifelong efforts to promote educational opportunities and career advancement for women and underrepresented minorities in STEM fields . She is also a founder of the Institute for Research on Learning to help improve education through the use of technology.
Elizabeth Feinler played a key role in the development of the early internet as director of the Network Information Center (NIC) at the Stanford Research Institute (SRI), responsible for managing the early internet domain name system (DNS) and assigning unique network addresses to computers on the internet.
Her work on the early internet helped establish many of the fundamental technologies and standards that are still used today, leading to her induction into the Internet Hall of Fame in 2012.
Katalin Karikó, a Hungarian-born biochemist, has been instrumental in developing modifications to mRNA molecules that would make them more stable and less likely to trigger an immune response, which paved the way for the use of mRNA as a tool for creating vaccines and other therapies.
Throughout her career, Karikó has played a pivotal role in the development of mRNA-based vaccines, including the COVID-19 vaccines, and in 2021 she was awarded the Princess of Asturias Award for Technical and Scientific Research for her groundbreaking work on mRNA-based therapeutics.
Dr. Katie Bouman led the development of an algorithm used to process data collected by the Event Horizon Telescope (EHT), a network of telescopes around the world used to capture the first-ever image of a black hole in 2019.
Her algorithm helped stitch together the data from the various telescopes and create an image that was the result of years of planning and collaboration, and she has since continued her work in the field of computer vision and image processing. In 2021, Bouman was awarded the Royal Photographic Society Progress Medal and Honorary Fellowship.
Dr. Katie Bouman led the development of an algorithm used to process data collected by the Event Horizon Telescope (EHT), a network of telescopes around the world used to capture the first-ever image of a black hole in 2019.
Her algorithm helped stitch together the data from the various telescopes and create an image that was the result of years of planning and collaboration, and she has since continued her work in the field of computer vision and image processing. In 2021, Bouman was awarded the Royal Photographic Society Progress Medal and Honorary Fellowship.
Throughout history, women have made significant contributions to science, math, astronomy, and information technology, despite facing significant obstacles and discrimination.
From the ancient Greek mathematician Hypatia to 19th century computer scientist Ada Lovelace to groundbreaking modern-day biochemist Katalin Karikó, women pioneers in these fields have challenged gender stereotypes and pushed the boundaries of what is possible.
Women — including Lovelace, daughter of the poet Lord Byron — made significant contributions to science and mathematics in the 19th and early 20th centuries that fundamentally changed the way we live and work today.
Lovelace is considered the first computer programmer for her work on Charles Babbage's Analytical Engine, a precursor to modern computers.
Beginning in the mid-20th century, women began to make their mark in the field of information technology and made critical contributions to the exploration of space and the development of the Apollo program.
Grace Hopper, a computer scientist and naval officer, invented the first compiler, a program that translates human-readable code into machine-readable code. She was also instrumental in the development of the COBOL programming language.
Katherine Johnson, a mathematician, worked for NASA and was instrumental in calculating the trajectories for the early space flights — including Apollo 11's flight to the moon — and was awarded the Presidential Medal of Freedom in 2012.
Women continue to make significant contributions to STEM fields today, including Nobel Laureate Frances Arnold, who won the Nobel Prize in Chemistry in 2018, and Dr. Katie Bouman, who played a pivotal role in the first-ever image of a black hole.
Despite the progress made, women still face numerous barriers in these fields, such as gender bias, discrimination, and the gender pay gap.
By celebrating the achievements of women pioneers in these fields during Women's History Month, their contributions can continue to inspire and pave the way for future generations of women in the fields of science, astronomy, biochemistry, and the groundbreaking technologies of tomorrow.
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