At the age of seven, Grace Hopper dismantled alarm clocks

Grace Hopper was inspired to join the armed forces after the attack on Pearl Harbor

Despite being too old to enlist and weighing below the required minimum to serve, Hopper was granted an exemption and assigned to work on the first electromechanical computer produced in the US. She and her team spent three months using the device to solve equations needed to design the implosion mechanism for the atomic bomb.

Later in life, the clock in Grace Hopper's office ran counterclockwise

Acknowledging that most people have "an enormous tendency to resist change," Hopper's clock served as a reminder for the computer scientist that just because things have been done a certain way does not mean they should forever remain that way: "They love to say, 'We've always done it this way.' I try to fight that." (Some users may experience a paywall.)

Grace Hopper described serving in the US Navy as the highest award she received

Despite retiring from the US Naval Reserve in 1966 at 60, as stipulated by Navy regulations, Hopper was repeatedly recalled for her pioneering expertise in computer science. By 1983, three years before her final retirement, she would give lectures about 200 days a year to computer scientists at military bases, college campuses, and businesses on behalf of the Navy.

For her contributions, Grace Hopper received more than 40 honorary degrees

Beyond the scholarships, professorships, and awards named in her honor, President George Bush awarded Hopper the National Medal of Technology in 1991 for her work in developing computer programming languages that enhanced accessibility. In 1996, Hopper became only the second woman to have a US Navy warship named after her.

Grace Hopper was named the 1959 Time magazine 'Woman of the Year'

The honor was part of the 2019 series "100 Women of the Year," which spotlighted an influential woman for each of the years the publication had previously awarded a "Man of the Year." In its write-up, Hopper was described as having "paved the way for women everywhere to thrive in math, computer science, and service to their countries."

Watch Grace Hopper's appearance on the 'Late Show with David Letterman'

During this comedic interview, Hopper describes her 43.5 years in the Navy, an anecdote about when President Reagan promoted her, and provides a visual aid to explain the transmission of information at the nanosecond scale via electricity.

Explore a collection of media depicting major milestones from the life of Grace Hopper

The gallery features Hopper's meeting with President Ronald Reagan, her attendance at the groundbreaking of the Grace Murray Hopper Service Center—a Naval data processing facility—and her Presidential Medal of Freedom ceremony.

President Barack Obama compared Grace Hopper to the Wright Brothers

When posthumously awarding Hopper with the Presidential Medal of Freedom—the nation's highest civilian honor—on Nov. 22, 2016, the former president remarked, "If Wright is flight, and Edison is light, then Hopper is code. [...] From cell phones to [US] Cyber Command, we can thank Grace Hopper for opening programming to millions more people."

Grace Hopper won the Data Processing Management Association's 'Man of the Year' award

The inaugural recipient of the award—symbolic of the male-dominated nature of computer science—was honored in 1969 for her contributions to the development of COBOL and the first compiler. Hopper would also become the first woman from any country and the first American to be recognized as a Distinguished Fellow of the British Computer Society.

Grace Hopper graduated first in her class of 800 officer candidates

As a volunteer in the Women Accepted for Volunteer Emergency Service program, Hopper was able to fulfill roles beyond the nursing and clerical responsibilities normally available to women in the military. However, once World War II concluded and the emergency status was lifted, the Navy declined her request for a regular commission.

Grace Hopper warned against prioritizing hardware purchases in future computing

Foreseeing the rising volume of data and the increasing demand for its processing and access, she advocated that organizations first map the total flow of information they require and then choose infrastructure to support it, rather than wastefully spending on the fastest computing technology and forcing software to compensate for unnecessary hardware or incorrect data.

In 2017, Yale renamed one of its colleges to honor Grace Hopper

Founded in 1933, the Calhoun College—one of Yale's 12 undergraduate residential colleges—was renamed to Grace Hopper College in honor of the woman who earned a master's degree and PhD in mathematics from the university in the 1930s. The change was also made to distance the school from white supremacist John C. Calhoun.

The Grace Hopper Celebration honors women in computing every year

Since 1994, the world's largest gathering of women technologists has been produced by The Anita Borg Institute, a nonprofit driving intersectional equity in the global technical workforce. The event honors the legacy of Grace Hopper by highlighting the research and impact of women in technology.

The first compiler to facilitate communication with computers was developed by Grace Hopper

The A-0 program linker automatically translated mathematical symbols into machine-readable binary code. Although it took two years for computer executives to get on board with the idea, the technology was foundational to future programming languages that allowed computers to understand commands written in word-based languages.

English mathematician Ada Lovelace wrote the first computer algorithm a century before computers existed and hypothesized that computing devices would one day be able to compose music—foreseeing the generative AI systems of today.

NVIDIA named several computer chip architectures after Grace Hopper

Unveiled in 2023, the GH200 Grace Hopper Superchip, designed for generative AI applications in data center-scale systems, combines a Grace CPU with a Hopper GPU to create a coherent memory model. This allows the Hopper to access Grace data directly, reducing the need to repeatedly copy data back and forth and vastly improving performance.

The terms 'bug' and 'debugging' were popularized by Grace Hopper's team

Engineers working on the Mark II computer at Harvard University identified a moth in one of its components in 1947, which caused it to malfunction. Describing the incident as the "first actual case of bug being found," the term first used by Thomas Edison in 1878 to describe faults in an apparatus caught on.

FLOW-MATIC was the first programming language resembling the English language

As part of the team working on UNIVAC—the first commercially produced electronic digital computer in the US—Grace Hopper helped develop the system that enabled nonprogrammers and businesspeople without a strong mathematics background to use the machine effectively, thereby enhancing the computer's commercial viability.

The story of two female programmers running the simulations behind chaos theory's discovery

Margaret Hamilton and Ellen Fetter worked on MIT's 800-pound Royal McBee LGP-30 computer, which was fed binary code on paper tape to perform computations. Among the computations performed were those involving equations describing the motion of gas in a circulating fluid for Edward Lorenz, widely considered the father of chaos theory.

A 2,000-year history of alarm clocks

Clocks have revolutionized the way we live, structuring our days into abstract, regular units and providing quantification for those who are chronically late. The alarm clock was the next obvious step: clocks which not only tell you the time but...

The story of Susy Thunder, the female hacker who disappeared

Here's the story of Susan Thunder, a woman who entered the hacker underground scene in the late 1970s and one day disappeared completely. She had a troubled past, facing abuse and hardship, and found solace in manipulating phone systems and later computer systems. She became involved with prominent hackers and her ability to control systems mirrored her quest for personal control. Her story highlights the role of social engineering in hacking.

The Antikythera mechanism: The oldest-known analog computer

A device now considered the world's oldest computer was pulled from a shipwreck more than 120 years ago. Known as the "Antikythera Mechanism," it is now believed to have allowed precise tracking of astronomical positions, and its sophistication overturned understanding of Ancient Greek capabilities.

Jacqueline Jenkins-Nye—Bill Nye's mother—worked as a code-breaker in World War II

While in the Navy, she was recruited to work on Enigma to help decode messages from the German military. Historians estimate that the efforts of code-breakers may have collectively shortened the war by as much as two years.

Lego's Women of NASA set honors four NASA pioneers: computer scientist Margaret Hamilton, astronaut Sally Ride, astronaut Mae Jemison, and astronomer Nancy Grace Roman.

Indigenous women crafted the integrated circuits for the Apollo Guidance Computer

Applying their blanket-weaving skills, over 1,000 Navajo women in New Mexico were hired to connect circuit components in intricate patterns using a microscope. Outside Boston, "rope mothers" at the Raytheon facility wove the AGC's core memory using threaded metal wires.

More than 2,000 years ago, a hand-powered model of the solar system called the Antikythera mechanism—the oldest example of an analog computer—could predict solar eclipses.

Computer pioneer Alan Turing was also an elite runner

Alan Turing is credited with helping to found modern computer science, in addition to cracking the Nazi code known as Enigma. Beyond these world-historical achievements, the British mathematician also nearly represented his country in the Olympics in the marathon, running just 11 minutes slower than the eventual gold recipient at the 1948 games. Read more on this lesser-known aspect of the man here.

Before starting Apple, Steve Jobs cold-called HP at 12 years old and got a summer job.

Before alarm clocks, people relied more heavily on their circadian rhythms, humans hired to wake them, and on tools such as candle clocks that dropped pins in metal trays at roughly set intervals.

Before transistors, which regulate the flow of electricity, vacuum tubes—glass tubes containing no gas that resemble light bulbs—served as the electronic switches in computers.

Designed in 1937 by Harvard graduate student Howard H. Aiken, the 'Harvard Calculator' was used by the US Navy to solve advanced physics problems.

How Audrey Hepburn became a spy during the Nazi occupation

Despite her status as one of Hollywood’s most beloved actresses, Audrey Hepburn experienced a war-torn childhood in Europe that few people know about. During her upbringing in the Netherlands, the Nazi occupation caused Hepburn to quit her life as a ballerina and made her family go hungry. In the face of adversity, Hepburn bravely carried messages for the Dutch resistance. Learn more about the star’s compelling life before finding fame.

The world's first chatbot, ELIZA, was developed in the 1960s as a technical demonstration exploring human-computer communication, with one of its scripts allowing it to emulate a psychotherapist.

The Wrights were inspired by a toy helicopter as kids

The pair tinkered with toys and dreamed of building a flying machine at a young age. Founders Podcast host David Senra read David McCullough's 2015 book on the duo and distilled key insights for leaders to take from their work and lives, focusing on their relentless resourcefulness.

The 'maiden of maiden voyages' who taught the world how to fly

In 1939, Clara Adams set the world record for the fastest person to circle the globe via commercial airliner, though she was a passenger and not a pilot. This article explores the impact of Adams' journey on the commercial flight industry. During...

As a girl, Billie Holiday fell in love with music while scrubbing the floors of a brothel

Record players were rarities in the 1920s, but Holiday had access to one at Alice Dean's, the brothel in Baltimore where she scrubbed floors. It was there that she listened to her heroes, Louis Armstrong and Bessie Smith.

CES debuted in 1967 amid a wave of miniaturization in at-home electronics

The rapid development of integrated circuits—the basis of computing power—in the 1960s catalyzed an industrial shift toward miniature devices, including pocket transistor radios, smaller TVs, and more. This first consumer electronics trade show (with a slate of 117 exhibitors and 17,000 attendees) sought to make everyday electronics accessible and portable. See a timeline of early consumer tech with photos.

A timeline of computer history

The earliest computers bear little resemblance to the computing devices that most people rely on today. This timeline graphic from the Computer History Museum tracks their evolution, from the early days of bulky mainframes that only experts generally used through to the personal computing revolution and on to the modern mobile era. Readers will learn important context ahead of the next major computing platform shift.

'Most of man's problems upon this planet, in the long history of the race, have been met and solved either partially or as a whole by experiment based on common sense and carried out with courage.'

-Frances Perkins (1880-1965), first female member of US Cabinet

Austen left formal school at 9

Jane Austen was the seventh of eight children. At 9, her father, a clergyman in the Church of England, removed her and her sister from the Abbey School in Reading because he could not afford the tuition. Jane continued her education at home, where the family read aloud and performed plays.

Watch how the Enigma machine encrypts messages and learn about its critical design flaw

Using settings selected from a series of rotors and a plugboard that let operators swap letters with any of their choosing, the machine lit up the output letter for each letter typed. While this system could generate messages requiring any of 150 quintillion potential keys, the machine's reflector never encrypted a letter as itself, providing an entry point for exploiting the system.

All computers are defined by their ability to input, store, process, and output data

From wooden machines to wearable tech, computers have changed a lot in appearance, but they all still perform the same essential tasks. Early computers were made of wood and metal—some were so big that they filled entire rooms just to solve simple math problems.

A Nantucket woman helped build Macy’s

Margaret Getchell, an early Macy’s superintendent, was among the first female executives in the American retail industry. Getchell (who was distantly related to Macy’s founder RH Macy, although it’s unclear if the pair knew that when she was hired) helped shape Macy's as an early employee.

Explore (digitally) the Computer History Museum

When IBM’s Deep Blue supercomputer won its famous chess rematch with then world champion Garry Kasparov in May 1997, the victory was hailed far and wide as a triumph of artificial intelligence. But John McCarthy—the man who coined the term and pioneered the field of AI research—didn’t see it that way. An obituary about McCarthy—who passed in 2001—and his ideas.

Nancy Roman, NASA's first chief of astronomy and the architect of the Hubble Space Telescope, was discouraged from pursuing science throughout her academic career.

COBOL was partly derived from Grace Hopper's FLOW-MATIC programming language

The Common Business-Oriented Language was developed for business data processing, supporting precise decimal calculations and an English-like syntax. Able to work across operating systems and hardware environments, COBOL and its newer versions support 80% of in-person credit card transactions and 95% of all ATM transactions.

Child prodigy writer Barbara Newhall Follett mysteriously disappeared in 1939

She published her first book at age 12 to much critical acclaim. She then did the same two years later. But by 25 she was married and struggling to publish another manuscript. One day, she left her apartment and never returned. The case was never solved.

Your iPhone started with a Cold War secret

Silicon Valley wasn't supposed to happen. A stretch of California orchard land somehow became the place that built the modern world: chips, PCs, the internet, the smartphone, and now AI. But the real story isn't the garage myth. It's a series of contradictions hiding in plain sight.

Bill Gates and Paul Allen were childhood friends before founding Microsoft

The two bonded over a teletype terminal at their school, which required a $40 hourly fee for computing time. They were banned from using the device after exploiting a bug that allowed them to bypass the fee, only to be later offered free computing time for finding more bugs.

The history and operation of SIGABA, the US counterpart of the Nazi Enigma machine

Developed by the US Army and US Navy, over 10,000 of these machines were deployed by the end of World War II to encrypt messages for the armed forces using three series of rotors. The device would continue to be used until the 1950s, while personal computers were shown to possess enough computing power to crack it by 2021.