Famous 20th Century Computer Scientists

Regarded as the father of computer science and artificial intelligence, Alan Turing was a distinguished mathematician and logician. During WWII, he successfully broke the challenging German Enigma machine codes thereby reducing the duration of war by a couple of years. The scientist, who was convicted for being gay, has been an inspiration for numerous films, plays and novels.

Widely recognized as one of the two important pioneers of the personal computer revolution, Steve Wozniak is credited with co-founding Apple Inc. along with Steve Jobs. Not surprisingly, he has been described as one of the men that changed the course of history through technology. Apart from being a programmer and technology entrepreneur, Steve Wozniak is also a well-known philanthropist.

Widely known as ten inventor of the world wide web, Tim Berners-Lee made the first communication between an HTTP client and server through the internet in 1989. He is associated with various organizations, such as the W3C and the World Wide Web Foundation, and has received the knighthood, too.

Claude Shannon was an electrical engineer, mathematician, and cryptographer. He is credited with publishing the article A Mathematical Theory of Communication which gave rise to the field of information theory. Hence, Shannon is considered the father of information theory. He is also credited with founding digital circuit design theory. During World War II, he contributed to the field of cryptanalysis.

Computer scientist, Dennis MacAlistair Ritchie, worked at Bell Labs Computing Sciences Research Center for most of his career, co-developing the Unix operating system and B programming language with Kenneth Thompson, co-winning the 1983 A.M. Turing Award for it. Earlier, he had also created C programming language and was involved with the development of the Plan 9 and Inferno operating systems.

Credited with coining the term software engineering, computer scientist and systems engineer, Margaret Heafield Hamilton served as the Director of the Software Engineering Division of the MIT Instrumentation Laboratory, overseeing the development of the on-board flight software for NASA's Apollo program.  A prolific writer, she is also the founder of two software companies; Higher Order Software and Hamilton Technologies.

Tony Hoare is a British computer scientist who is credited with developing the sorting algorithm quicksort. He is also credited with developing Hoare logic, a formal system for verifying program correctness. Over the years, Tony Hoare has received several prestigious awards for his contribution to computer science.

Businessman Gabe Newell is the co-founder and president of the video game developer and digital distribution company, Valve. As a young man, he worked for Microsoft for several years before he quit to found his own venture. He was inducted into the Academy of Interactive Arts & Sciences Hall of Fame in 2013.

James Gosling earned the nickname Dr. Java after he revolutionized the world of computer programming with his Java programming language. The Carnegie Mellon alumnus has had a 26-year stint with Sun Microsystems. The computer nerd has a picture of the first 1000 digits of √2 framed in his office.

Computer-game developer John Carmack introduced pioneering innovations in the 3-D game arena. He specializes in first-person shooter games, such as Quake and Doom. The id Software founder had spent a year in a juvenile home and had later dropped out of university to become a freelance programmer.

Leading American technologist, business leader and philanthropist, Bill Gates is the co-founder of the world’s largest software company, Microsoft. His passion for computers made him one of the richest in the world and through his charity foundation, Bill & Melinda Gates Foundation, he and his ex-wife, Melinda, use this money generously to help people world over live a better life.

Mathematician and computer scientist Donald Ervin Knuth is best known for his contribution to the development of the rigorous analysis of the computational complexity of algorithms. Also the creator of the TeX computer typesetting system as well as the WEB and CWEB computer programming systems, he has published twenty books, most significant among them being The Art of Computer Programming.

A.M. Turing Award-winning Israeli-American computer scientist Judea Pearl is known for his work on artificial intelligence and for creating the Bayesian network. He has penned several books on causality, too. He is also known as the father of Daniel Pearl, the journalist who was beheaded by Islamic terrorists in Pakistan.

After gaining a degree in psychology, Geoffrey Hinton earned a PhD in artificial intelligence. The Google VP is a Turing Award-winning computer scientist and also teaches at the University of Toronto. A Fellow of the Royal Society, he has revolutionized neural network research and has co-written about 200 papers.

Mathematician George Dantzig, known for his research on linear programming, was the first to develop the simplex method. The National Medal of Science winner was the son of mathematician and linguist Tobias Dantzig. He was associated with RAND Corporation and also taught computer science and operations research at Stanford.

Ray Kurzweil is an American futurist and inventor best known for his work in fields like optical character recognition, speech recognition technology, and text-to-speech synthesis. A proponent of life extension technologies and robotics, Kurzweil was honored with the National Medal of Technology and Innovation in 1999. In 2002, he was inducted into the National Inventors Hall of Fame.

Known for her humility and simplicity, Indian philanthropist and author Sudha Murty had humble beginnings as a TELCO engineer. She is married to Infosys co-founder Narayan Murty and heads the Infosys Foundation. The Padma Shri winner has penned over 200 titles, such as Dollar Bahu, in both Kannada and English.

A pioneering computer scientist from the Netherlands, Edsger W. Dijkstra had initially studied theoretical physics, before focusing on computers. He developed the domain of structured programming and also won honors such as the Turing Award. He died at 72, after a long struggle with cancer.

Computer programmer and entrepreneur Shawn Fanning revolutionized the world of information technology by developing a program that let users share MP3 copies of music from their personal computers with others on the internet. His invention led to the formation of Napster and got him featured on the cover of Time.

Turing Award-winning Swiss computer scientist Niklaus Wirth revolutionized information technology with his invention of computer languages such as ALGOL-W, PASCAL, and MODULA. He has also taught at Stanford and ETH Zürich and penned a number of books on algorithms and data structures. He has also popularized Wirth's law.

Bjarne Stroustrup is a Danish computer scientist best known for his invention and development of the popular C++ general-purpose programming language. He is currently working as a managing director at Morgan Stanley in New York, apart from serving as a visiting professor at the prestigious Columbia University. 

Turing Award-winning Israeli cryptographer Adi Shamir is one of the co-inventors of RSA encryption. He also owns patents to more than a dozen more inventions. He has been associated with the University of Warwick and the Massachusetts Institute of Technology, and has also taught at the Weizmann Institute.

The brain behind the Acorn Micro-Computer, Sophie Wilson also contributed to the BBC Micro and ARM architecture. During her first summer vacation at Cambridge, she designed an automated cow-feeder. Born Roger Wilson, she went through a sex-change surgery in 1994. She is also associated with local theater groups.

Known online as Geohot, George Francis Hotz is an American security hacker and software engineer, who at the age of seventeen became the first person to hack Apple’s iPhone. Later, he developed iOS jailbreaks and became the first person to crack a defense system in Sony PlayStation 3. Currently, he is working at comma.ai, a startup he founded in 2015.

Harvard Law School professor Lawrence Lessig established Creative Commons, a non-profit geared at reducing copyright restrictions, thus helping artists and creative professional share their works legally. A Democrat, he also co-founded Rootstrikers, aimed at combating corruption in Congress. He is also a TED speaker and has penned books such as Lesterland.

Andy Rubin earned the nickname Android during his time at Apple due to his obsession with robots and later co-founded Android Inc., becoming its CEO. He worked with Google for 9 years but quit the company amid sexual harassment allegations and an employee walk-out over his supposed exit package.

Gottfrid Svartholm is a Swedish computer specialist best known as the ex-co-owner of the web hosting company and Internet service provider PRQ. He is also credited with co-founding The Pirate Bay along with Peter Sunde and Fredrik Neij. In 2014, Gottfrid Svartholm was imprisoned for his connection with WikiLeaks and released the following year.

Andy Hertzfeld is an innovator and software engineer. During the 1980s, Hertzfeld was one of the members of the Apple Macintosh development team. He is also credited with co-founding companies like Radius, General Magic, and Eazel. From 2005 to 2013, he contributed to the development of Google+. Elden Henson and Michael Stuhlbarg portrayed him in Jobs and Steve Jobs respectively.

Mark Shuttleworth is a South African-British entrepreneur. He is credited with founding Canonical, the company that developed the popular Linux-based Ubuntu operating system. Mark Shuttleworth became the first African from an independent country and the first South African to travel to space; he traveled as a space tourist in 2002.

A consumer electronics pioneer, entrepreneur Clive Sinclair began his business venture selling radio and amplifier kits. He went on to launch the word’s first pocket calculator and later also worked on products such as digital watches and pocket TV. He is a fan of poker and is a Mensa member.