Max Rafael Levchin

Co-developer of PayPal and co-creator of the Gausebeck-Levchin test, one of the first commercial implementations of a CAPTCHA, Levchin is a Ukrainian-born American computer scientist and internet entrepreneur widely known as one...

John (J. B.) Battiscombe Gunn

Inventor of the Gunn diode, the first inexpensive source of microwave power that did not require vacuum tubes, Gunn discovered the Gunn Effect while working at IBM in 1962. Gunn diodes have...

Alan Jay Perlis

A pioneer in advanced programming techniques and compiler construction, Perlis was the first recipient of the ACM Turing Award in 1966, sometimes called the "Nobel Prize of Computing." Perlis was born on April...

Frederic Calland Williams

Pioneer of the first stored-program digital computer and inventor of the Williams–Kilburn tube memory device, Williams transformed the foundations of modern computing. In 1946, he was appointed as head of the Electrical...

Amar Mukherjee

Pioneer in Switching Theory and the first to develop an algorithm for the minimization of EXOR-AND-type logic networks, Mukherjee was internationally recognized for his contributions to Hardware Algorithms for Non-numeric Computation, VLSI...

Brendan Eich

Creator of the JavaScript scripting language, Eich is a computer programmer and chief technology officer of Mozilla Corporation. He worked with MicroUnity Systems Engineering writing microkernel and DSP code, and doing the...

Oliver William Standingford

Responsible for the implementation of LEO I, the first computer used for commercial business applications, Standingford was a senior manager at J. Lyons and Co. who oversaw its procurement alongside Raymond Thompson. Born...

Elaine J. Weyuker

Leading researcher on rigorous software testing, including industrial evaluations of the comparative effectiveness and costs of such testing methods, Weyuker is an ACM Fellow, an IEEE Fellow (since 2003), and an AT&T...

Peter Kogge

Designer of the Space Shuttle I/O processor — one of the first multithreaded computers and the first to fly in space — Kogge is a computer engineer and 1993 IBM Fellow who...

Ian Munro Ross

Co-inventor of epitaxy, used in silicon-based manufacturing processes for BJTs and modern CMOS and particularly important for compound semiconductors such as gallium arsenide, Ross was also an early pioneer in transistors who...

Fritz Joachim Weyl

Developer of the U.S. government Office of Naval Research (ONR) Computer in 1946, Weyl was a renowned mathematician who significantly contributed to research in mathematics during his lifetime and came to be...

Stephen J. Fink

One of the primary developers and maintainers of the T.J. Watson Libraries for Analysis (WALA), which provides static analysis capabilities for Java bytecode and related languages, Fink has been a research scientist...

Patricia S. Cowings

The first American woman to be trained as a scientist astronaut by NASA, Cowings was an aerospace psychophysiologist whose work focused on the physiology of astronauts in outer space. She served as...

Jonathan J. Rubinstein

Instrumental in the development of the iPod, Rubinstein is an American computer scientist and electrical engineer who played a central role in creating the portable music and video device first sold by...

Daniel Henry Holms Ingalls, Jr.

Inventor of BitBlit, the general-purpose graphical operation underlying most bitmap graphics systems, Ingalls is a pioneer of object-oriented computer programming and the principal architect, designer, and implementor of five generations of Smalltalk...

Henry Ross Perot

Founder of Electronic Data Systems (EDS) in 1962, Perot built one of the most influential technology services companies in American history. He sold EDS to General Motors in 1984, and founded Perot...

Rosalyn S. Yalow

Co-winner of the 1977 Nobel Prize in Physiology or Medicine, Yalow shared the honor with Roger Guillemin and Andrew Schally for the development of the radioimmunoassay technique. She was the second woman...

Luke Nosek

Co-founder of PayPal and creator of the company's "instant transfer" product, Nosek is a Polish-born American entrepreneur. He received a B.S. degree in Computer Science from the University of Illinois at Urbana-Champaign....

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...

Frederic (Ted) Withington

Founder board member of the IT History Society and Silicon Valley venture capitalist, Withington began his career as a programmer at NSA in 1953. Over the years he worked for computer makers...