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Alfred Aho and Jeffrey Ullman win computing's Turing Award for their work inventing computer program compilers

The ACM A. M. Turing Award is an annual prize given by the Association for Computing Machinery (ACM) for contributions of lasting and major technical importance to computer science.

The ACM A. M. Turing Award is an annual prize given by the Association for Computing Machinery (ACM) for contributions of lasting and major technical importance to computer science. It is generally recognized as the highest distinction in the field of computer science and is often referred to as the "Nobel Prize of Computing". As of 2025, 79 people have been awarded the prize, with the most recent recipients being Andrew Barto and Richard S. Sutton, who won in 2024.

The award is named after Alan Turing, also referred as "Father of Computer Science", who was a British mathematician and reader in mathematics at the University of Manchester.

Events Before

  1. Pro-Iranian protesters end siege of US Embassy in Baghdad, Iraq

    Pro-Iranian protesters end siege of US Embassy in Baghdad, Iraq

  2. Scotland's Peter Wright beats Dutch defending champion Michael Van Gerwen 7-3 with a 102.79 average, 34 x 140s, 11 maxim

    Scotland's Peter Wright beats Dutch defending champion Michael Van Gerwen 7-3 with a 102.79 average, 34 x 140s, 11 maximums, and 53% on doubles to seal his first PDC World Darts Championship in London

  3. Australian actor Liam Hemsworth and American singer Miley Cyrus divorce after 1 year of marriage

    Miley Ray Cyrus ( MY-lee SY-rəs, born Destiny Hope Cyrus; November 23, 1992) is an American singer, songwriter, and actress.

  4. China locks down the city of Wuhan and its 9 million people in a belated but ultimately successful effort to control the

    China locks down the city of Wuhan and its 9 million people in a belated but ultimately successful effort to control the city's COVID-19 outbreak

  5. American actress and TV host Niecy Nash (50) divorces American electrical engineer Jay Tucker after over 8 years of marr

    American actress and TV host Niecy Nash (50) divorces American electrical engineer Jay Tucker after over 8 years of marriage

Events After

  1. Chicago Bulls forward DeMar DeRozan becomes the first player in NBA history to hit buzzer-beaters on consecutive days; h

    Chicago Bulls forward DeMar DeRozan becomes the first player in NBA history to hit buzzer-beaters on consecutive days; he hits 3-pointers to beat the Washington Wizards 120-119 and the previous night the Indiana Pacers 108-106

  2. Actors Lisa Bonet and Jason Momoa divorce after four years of marriage

    Actors Lisa Bonet and Jason Momoa divorce after four years of marriage

  3. Russia launches a full-scale pre-dawn and unprovoked invasion of Ukraine by land, air, and sea, with bombings in several

    Russia launches a full-scale pre-dawn and unprovoked invasion of Ukraine by land, air, and sea, with bombings in several cities. Moments later, Vladimir Putin announces the start of a three-day “special military operation” in Ukraine to "demilitarize" the country. [1]

  4. In a major victory for Ukraine, Russia announces it is withdrawing its badly mauled forces from around Ukraine's capital

    In a major victory for Ukraine, Russia announces it is withdrawing its badly mauled forces from around Ukraine's capital, Kyiv

  5. "Top Gun Maverick" the sequel starring Tom Cruise, Miles Teller and Jennifer Connelly is released 36 years after the ori

    "Top Gun Maverick" the sequel starring Tom Cruise, Miles Teller and Jennifer Connelly is released 36 years after the original film

More from the 2020s

Pro-Iranian protesters end siege of US Embassy in Baghdad, Iraq

Pro-Iranian protesters end siege of US Embassy in Baghdad, Iraq

Scotland's Peter Wright beats Dutch defending champion Michael Van Gerwen 7-3 with a 102.79 average, 34 x 140s, 11 maxim

Scotland's Peter Wright beats Dutch defending champion Michael Van Gerwen 7-3 with a 102.79 average, 34 x 140s, 11 maximums, and 53% on doubles to seal his first PDC World Darts Championship in London

Cuba's "day zero" unifies its two currencies by withdrawing the Cuban Convertible Peso (CUC), alongside steep increases

Cuba's "day zero" unifies its two currencies by withdrawing the Cuban Convertible Peso (CUC), alongside steep increases in prices and salaries, effectively devaluing the remaining Cuban Peso for the first time since 1959 [1]

Chicago Bulls forward DeMar DeRozan becomes the first player in NBA history to hit buzzer-beaters on consecutive days; h

Chicago Bulls forward DeMar DeRozan becomes the first player in NBA history to hit buzzer-beaters on consecutive days; he hits 3-pointers to beat the Washington Wizards 120-119 and the previous night the Indiana Pacers 108-106

Frequently Asked Questions

What happened on March 31, 2021?
The ACM A. M. Turing Award is an annual prize given by the Association for Computing Machinery (ACM) for contributions of lasting and major technical importance to computer science.
Why is Alfred Aho and Jeffrey Ullman win computing's Turing Award for their work inv... historically important?
Sutton, who won in 2024. The award is named after Alan Turing, also referred as "Father of Computer Science", who was a British mathematician and reader in mathematics at the University of Manchester.

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March 31 in HistoryYear 2021