Heinz Nixdorf

German computer entrepreneur, Nixdorf founded and led Nixdorf Computer AG. He developed and marketed low-end commercial computers mainly within Europe between 1965 and 1985. He had production facilities in Germany, Ireland, Spain,...

Martin Charles Golumbic

Contributor to fundamental research in artificial intelligence in the area of complexity and spatial-temporal reasoning, Golumbic is a mathematician and computer scientist best known for his work in algorithmic graph theory and...

Harvey G. Cragon

Designer and builder of the first digital computer with Integrated Circuits (IC) and the first TTL computer, Cragon is recognized as a pioneering American computer engineer. Born in Ruston, Louisiana, he studied...

James W. Cortada

Noted IT historian and author, Cortada is also the founder and a board member of the IT History Society. Cortada joined IBM in 1974 as a salesman, and held a variety of sales...

Jerzy Witold Różycki

Inventor of the "clock" method for determining Enigma rotor positions, Różycki was a Polish mathematician and cryptologist who worked at breaking German Enigma-machine ciphers. He was born in what is now Ukraine,...

Walter F. Bauer

Pioneer in the use of electronic computers and founder of Informatics General Corporation, Bauer distinguished himself as a research digital computer engineer. During World War II, he served as a weather officer...

Jay N. Goldberg

Purchaser of Money Management Systems, Inc. (MMS) in 1986, Goldberg acquired the firm — which sold software and services to banks and broker-dealers for securities trading activities — from Ziff-Davis, later selling...

Geoffrey William Arnold Dummer

The first person to conceptualize and build a prototype of the integrated circuit, commonly called the microchip, Dummer made this pioneering contribution in the late 1940s and early 1950s. He passed the...

Thomas Siebel

Founder of Siebel Systems and pioneer of customer relationship management (CRM), Siebel revolutionized sales by developing software to automate sales and customer service activities. He graduated from the University of Illinois at...

James Henry Rand, Jr.

Founder and President of Remington Rand, Rand built what became the largest business machine manufacturing plant in the world and showed remarkable foresight in purchasing the Eckert-Mauchly Computer Corporation in 1950, whose...

Marshall T. Rose

A network protocol and software engineer who contributed extensively to the Internet Engineering Task Force (IETF), Rose has played a central role in shaping the Internet and network applications. His work on...

Stephen W. Dunwell

Lead engineer in the development of IBM's STRETCH supercomputer, Dunwell oversaw a project that was first shipped in 1962—two years before the introduction of the legendary IBM System/360. The development of STRETCH illustrates...

Benoît B. Mandelbrot

Discoverer of the Mandelbrot set of intricate, never-ending fractal shapes — said to be "one of the most astonishing discoveries in the entire history of mathematics" — Mandelbrot also developed a "theory...

Wayne D. Pickette

Conceptualized as the design for putting a computer on a chip, Pickette's work is arguably one of the greatest technological advances of the Twentieth Century. A self-taught childhood electronics prodigy, he recalled...

Henrietta Swan Leavitt

Her discovery of the period-luminosity relationship for Cepheid variable stars gave astronomers their first reliable tool for measuring distances to other galaxies, fundamentally shifting the understanding of the scale and nature of...

William (Bill) Worley Jr.

Principal creator of HP's two most important computer architectures, Worley's work includes PA-RISC (Precision Architecture—Reduced Instruction Set Computing) in the 1980s and PA-WW (Wide-Word) in the 1990s. He started programming in 1959 for...

Harold (Bud) Lawson

Creator of the pointer variable in programming languages and contributor to PL/I, Lawson has been active in the field of computing since 1958 with broad international experience in industrial and academic environments....

Joy Buolamwini

Founder of the Algorithmic Justice League (AJL), Buolamwini founded an organization dedicated to challenging bias in decision-making software through art, advocacy, and research. Her work highlighted the social implications and harms of...

Jack P. Ruina

Director of the Advanced Research Projects Agency (ARPA) from 1961 to 1963, during which the idea of an information processing program was initiated, Ruina held a position that proved foundational to what...

Paul Armer

President of AFIPS and longtime RAND computer scientist, Armer studied chemistry at Loyola University in Los Angeles. His college career was interrupted by the armed services, where he worked in meteorology. After...