List of computer scientists

A Wil van der Aalst – business process management, process mining, Petri nets Hal Abelson – intersection of computing and teaching Serge Abiteboul – database theory Samson Abramsky – game semantics Leonard Adleman – RSA, DNA computing Manindra Agrawal – polynomial-time primality testing Luis von Ahn – human-based computation Alfred Aho – compilers book, the 'a' in AWK Amos Nuwasiima – PHP Programming book Frances E. Allen – compiler optimization Alexander Scaranti – Image Processing, Image Retrieval Gene Amdahl – supercomputer developer, founder of Amdahl Corporation A. Annerl – multidimensional processing, computational complexity theory Andrew Appel – compilers text books Sanjeev Arora – PCP theorem A. E. Hugo - parallel computing on heterogeneous multicore architectures John Vincent Atanasoff – computer pioneer Ali Aydar - computer scientist and CEO of Sporcle

B Charles Babbage (1791-1871) – invented first mechanical computer Roland Carl Backhouse – mathematics of program construction John Backus – FORTRAN, Backus–Naur form Anthony James Barr – SAS System Jean Bartik (1924-2011) - One of first computer programmers, on ENIAC(1946), one of

first Vacuum_tube computers, back when "programming" involved using cables, dials, and switches to physically rewire the machine. Worked with John Mauchly toward BINAC(1949), EDVAC(1949), UNIVAC(1951) to develop early "Stored_program" computers.

Rudolf Bayer – B-tree James C. Beatty, Jr. – compiler optimization,[1] super-computing[2]

Gordon Bell (1931- τ) - computer designer DEC VAX, author: Computer Structures Steven M. Bellovin – network security Tim Berners-Lee – World Wide Web

Dines Bjørner – Vienna Development Method (VDM), RAISE Gerrit Blaauw – one of the principal designers of the IBM System 360 line of computers Manuel Blum – cryptography Barry Boehm – software engineering economics, spiral development Grady Booch – Unified Modeling Language, Object Management Group George Boole – Boolean logic Bert Bos – Cascading Style Sheets Jonathan Bowen – Z notation, formal methods Stephen R. Bourne – Bourne shell, portable ALGOL 68C compiler Robert S. Boyer – string searching, ACL2 theorem prover Julian C. Bradfield – logic and concurrency, Expressivity of the mu-calculus Jack E. Bresenham – early computer graphics contributions including Bresenham's

algorithm David J. Brown – Unified Memory Architecture, Binary Compatibility Per Brinch Hansen (surname "Brinch Hansen") – concurrency Sjaak Brinkkemper – methodology of product software development Fred Brooks – System 360, OS/360, The Mythical Man-Month, No Silver Bullet Alan Burns – real-time computing Michael Butler – Event-B Ben Aaron Mwale – computer systems

C Martin Campbell-Kelly – history of computing Luca Cardelli – objects Claire Cardie – natural language processing, automatic summarization, machine learning Edwin Catmull – computer graphics Vinton Cerf – Internet, TCP/IP Zhou Chaochen – duration calculus Xiuzhen (Susan) Cheng – computer networks Alonzo Church – mathematics of combinators, lambda calculus Gabriel Ciobanu – semantics, process calculi, membrane computing Edmund M. Clarke – model checking John Cocke – RISC Edgar F. Codd (1923-2003) – formulated the database relational model Simon Colton – Computational Creativity Paul Justin Compton – Ripple Down Rules Gordon Cormack – co-inventor of dynamic Markov compression Stephen Cook – NP-completeness James Cooley – Fast Fourier transform (FFT) Fernando J. Corbató – Compatible Time-Sharing System (CTSS), Multics Patrick Cousot – abstract interpretation Seymour Cray – Cray Research, supercomputer Nello Cristianini – Machine learning, pattern analysis, artificial intelligence Orxan Gadirli - Qafqaz University, Computer Engineering.

D Ole-Johan Dahl – Simula Andries van Dam – computer graphics, hypertext Christopher J. Date – proponent of database relational model Erik Demaine – computational origami Dorothy E. Denning – computer security Peter J. Denning – identified the use of an operating system's working set and balance set Alexander Dewdney Vinod Dham – P5 Pentium processor Jan Dietz - information systems theory and "Design & Engineering Methodology for

Organizations" Whitfield Diffie – Public key cryptography, Diffie–Hellman key exchange, Edsger Dijkstra – algorithms, Goto considered harmful, semaphore (programming) Jack Dongarra – linear algebra high performance computing Marco Dorigo – ant colony optimization Paul Dourish – human computer interaction Charles Stark Draper - designer: Apollo Guidance Computer, "Father of inertial

navigation", MIT Professor. Susan Dumais – Information Retrieval Adam Dunkels – Protothreads Alan Dix – literally wrote the book on HCI Human–computer interaction

E Wim Ebbinkhuijsen – COBOL John Presper Eckert – ENIAC Philip-Emeagwali – supercomputing E. Allen Emerson – model checking Douglas Engelbart – tiled windows, hypertext, computer mouse Don Estridge (1937-1985) Led development of original IBM Personal Computer (PC),

known as "father of the IBM PC". Christopher Riche Evans David C. Evans – computer graphics

F Edward Feigenbaum – intelligence Edward Felten – computer security Tommy Flowers – Colossus computer Robert Floyd – NP-completeness Daniel P. Friedman

G Bernard Galler – MAD (programming language) Hector Garcia-Molina Michael Garey – NP-completeness Seymour Ginsburg – formal languages, automata theory, AFL theory, database theory Kurt Gödel – computability – not a computer scientist per se, but his work was invaluable

in the field Adele Goldberg – Smalltalk Ian Goldberg – cryptographer, off-the-record messaging Oded Goldreich – cryptography, computational complexity theory Shafi Goldwasser – cryptography, computational complexity theory Gene Golub – matrix (math) computation Martin Charles Golumbic – algorithmic graph theory James Gosling – NeWS, Java (programming language) Paul Graham – Viaweb, On Lisp, Arc Susan L. Graham – compilers, programming environments Jim Gray – database Sheila Greibach – Greibach normal form, AFL theory Ralph Griswold – SNOBOL Bill Gropp – Message Passing Interface, PETSc Barbara J. Grosz – Natural Language Processing, Planning, Centering Theory Ramanathan V. Guha – RDF, Netscape, RSS (file format), Epinions Neil J. Gunther – computer performance analysis, capacity planning Peter G. Gyarmati – adaptivity in operating systems and networking

H Philipp Matthäus Hahn – mechanical calculator Eldon C. Hall – Apollo Guidance Computer Richard Hamming – Hamming code, founder of the Association for Computing

Machinery Jiawei Han – Data mining Juris Hartmanis – computational complexity theory Johan Håstad – computational complexity theory Les Hatton – software failure and vulnerabilities He Jifeng – provably correct systems Martin Hellman – encryption Gernot Heiser – Development of L4 and founder of OK Labs James Hendler – Semantic Web John L. Hennessy – computer architecture Danny Hillis – Connection Machine Julia B. Hirschberg – Computational Linguistics C. A. R. Hoare – Logic, rigor, Communicating sequential processes (CSP) John Henry Holland – genetic algorithms

Herman Hollerith – invented recording of data on a machine readable medium, using punched cards

John Hopcroft – compilers Admiral Grace Hopper (1906-1992) – develop early compilers: FLOW-Matic, COBOL.

Also worked on UNIVAC, gave speeches on computer history, where when gave out nano-seconds.

Eric Horvitz - Artificial Intelligence David A. Huffman (1925-1999) – Huffman coding, used in data compression.

I Jean Ichbiah – Ada (programming language) Dan Ingalls - Bit_blit, Lively_Kernel Kenneth E. Iverson – APL (programming language), J (programming language)

J Ivar Jacobson – Unified Modeling Language, Object Management Group Cliff Jones – Vienna Development Method (VDM) Bill Joy (1954-ξ) – Sun Microsystems, BSD UNIX, vi, csh

K William Kahan – numerical analysis Robert E. Kahn – TCP/IP Avinash Kak – digital image processing Daniel Mopati Kapeng – web designing principles Alan Kay – Dynabook, Smalltalk, overlapping windows Richard Karp – NP-completeness Narendra Karmarkar – Karmarkar's algorithm Marek Karpinski – NP optimization problems John George Kemeny – BASIC Ken Kennedy – compiling for parallel and vector machines Brian Kernighan (1942- τ) – Unix, the 'k' in AWK Carl Kesselman – grid computing Gregor Kiczales – CLOS, reflection (computer science), aspect-oriented programming Stephen Cole Kleene – Kleene closure, recursion theory Leonard Kleinrock – ARPANET, queueing theory, packet switching, hierarchical routing Donald Knuth – The Art of Computer Programming, MIX/MMIX, TeX, literate

programming Andrew Koenig – C++ Michael Kölling – BlueJ Janet L. Kolodner – case-based reasoning David Korn – Korn shell Kees Koster – ALGOL 68

John Koza – genetic programming Andrey Nikolaevich Kolmogorov – algorithmic complexity theory Robert Kowalski – logic programming John Krogstie – SEQUAL framework Joseph Kruskal – Kruskal's algorithm Thomas E. Kurtz – BASIC programming language, Dartmouth computer professor.

L Leslie Lamport – algorithms for distributed computing, LaTeX. Manny M Lehman – Laws of Software Evolution Charles E. Leiserson – cache-oblivious algorithms, provably good work-stealing,

coauthor of Introduction to Algorithms Douglas Lenat – artificial intelligence, Cyc Rasmus Lerdorf – PHP Leonid Levin – computational complexity theory John Lions – Lions Book Richard J. Lipton – computational complexity theory Barbara Liskov – programming languages Diane R. Litman – planning, natural language processing Ada Lovelace – first programmer

M Zohar Manna – fuzzy logic Max Levchin – Gausebeck-Lechin Test and PayPal James Martin – information engineering Robert C. Martin (Uncle Bob) - Software craftsmanship John Mashey Yuri Matiyasevich – solving Hilbert's tenth problem Yukihiro Matsumoto – Ruby (programming language) John Mauchly (1907-1980) - Designed ENIAC. First general purpose electronic digital

computer, as well as EDVAC, BINAC and UNIVAC I, the first commercial computer. Worked with Jean Bartik on ENIAC, and Grace Murray Hopper on UNIVAC.

John McCarthy – Lisp (programming language), artificial intelligence Douglas McIlroy – pipes Kathleen R. McKeown – Natural Language Processing – Automatic Summarization Chris McKinstry – artificial intelligence, Mindpixel Marshall Kirk McKusick – BSD, Berkeley Fast File System Lambert Meertens – ALGOL 68, ABC (programming language) Bertrand Meyer – Eiffel (programming language) Silvio Micali – cryptography Robin Milner – ML (programming language) Marvin Minsky – artificial intelligence, perceptrons, Society of Mind Paul Mockapetris – Domain Name System (DNS)

Cleve Moler – numerical analysis, MATLAB Edward F. Moore – Moore machine Gordon Moore – Moore's law J Strother Moore – string searching, ACL2 theorem prover Hans Moravec – robotics Robert Tappan Morris – Morris worm Joel Moses – Macsyma Stephen Muggleton Debajyoti Mukhopadhyay – interoperability, web mining

N Mihai Nadin – anticipation research Makoto Nagao – machine translation, natural language processing, digital library Frieder Nake – pioneered computer arts Peter Naur – BNF, ALGOL 60 Roger Needham James G. Nell – GERAM Bernard de Neumann – massively parallel autonomous cellular processor, software

engineering research John von Neumann (1953-1957) – early computers, von Neumann machine, set theory,

functional analysis, mathematics pioneer, linear programming, quantum mechanics. Allen Newell – artificial intelligence, Computer Structures Max Newman – Colossus, MADM Andrew Ng – artificial intelligence, machine learning, robotics Nils Nilsson – artificial intelligence G.M. Nijssen – NIAM Peter Nordin – artificial intelligence, genetic programming, evolutionary robotics Donald Norman – user interfaces, usability George Novacky – Assistant Department Chair and Senior Lecturer in Computer Science,

Assistant Dean of CAS for Undergraduate Studies at University of Pittsburgh Kristen Nygaard – Simula

O T. William Olle – Ferranti Mercury Mark Overmars – game programming

P David Parnas – information hiding, modular programming Yale Patt – Instruction Level Parallelism, speculative architectures

Randy Pausch (1960-2008) - Human-Computer interaction, Carnegie Professor, "Last Lecture".

Judea Pearl – artificial intelligence, Search Alan Perlis – Programming Pearls Radia Perlman – spanning tree protocol Simon Peyton Jones – functional programming Gordon Plotkin Amir Pnueli – temporal logic Willem van der Poel – computer graphics, robotics, geographic information systems,

imaging, multimedia, virtual environments, games Martha Pollack – intentions in planning Emil Post – mathematics Jon Postel – Internet Franco Preparata William H. Press - numerical algorithms

R Michael O. Rabin – nondeterministic machines Dragomir R. Radev – Natural Language Processing, Information Retrieval T. V. Raman – accessibility, Emacspeak, etc. Brian Randell – dependability Yoav Raz – databases: commitment ordering (or commit ordering) for guaranteeing

distributed and global serializability Raj Reddy – AI Joyce K. Reynolds – Internet Dennis Ritchie – C (programming language), UNIX Ron Rivest – RSA, MD5, RC4 Colette Rolland – REMORA methodology, meta modelling Douglas T. Ross – Structured Analysis and Design Technique Guido van Rossum – Python (programming language) Winston W. Royce – Waterfall model Rudy Rucker – mathematician, Writer, Educator Steven Rudich – complexity theory, cryptography James Rumbaugh – Unified Modeling Language, Object Management Group Juan Manuel Ramirez – Researcher / writer, Open Source Software Technologies

S Siddhant Kotnala – programming Languages, Operating System Gerard Salton – information retrieval Jean E. Sammet – programming languages Claude Sammut – Artificial Intelligence researcher Carl Sassenrath – operating systems, programming languages, Amiga, REBOL

Walter Savitch - discovery of complexity class NL, Savitch's theorem, natural language processing, mathematical linguistics

Wilhelm Schickard – one of first calculating machines Bruce Schneier – cryptography, security Fred B. Schneider – concurrent and distributed computing Michael I. Schwartzbach – computer scientist at Aarhus University Dana Scott – domain theory Michael L. Scott – programming languages, algorithms, distributed computing Ravi Sethi – compilers, 2nd Dragon Book Adi Shamir – RSA, cryptanalysis Claude Shannon – information theory David E. Shaw – computational finance, computational biochemistry, parallel

architectures Scott Shenker – networking Ben Shneiderman – human-computer interaction, information visualization Edward H. Shortliffe – MYCIN (Medical diagnostoc expert system) Joseph Sifakis – model checking Herbert Simon – artificial intelligence Daniel Sleator – splay tree, amortized analysis Arne Sølvberg – information modelling Brian Cantwell Smith – reflection (computer science), 3lisp Karen Sparck-Jones – Information Retrieval, Natural Language Processing Steven Spewak – Enterprise Architecture Planning Robert Sproull Maciej Stachowiak – GNOME, Safari, WebKit Richard Stallman – GNU Project Richard Stearns – computational complexity theory Guy L. Steele, Jr. – Scheme, Common Lisp Thomas Sterling – Creator of Beowulf clusters W. Richard Stevens (1951-1999)Renowned author of "TCP/IP Illustrated", "Advanced

Programming in the Unix Environment" and other books. Larry Stockmeyer – computational complexity, distributed computing Michael Stonebraker – relational database practice and theory Christopher Strachey – denotational semantics Bjarne Stroustrup – C++ Madhu Sudan – computational complexity theory, coding theory Gerald Jay Sussman – Scheme Bert Sutherland – graphics, Internet Ivan Sutherland – graphics Mario Szegedy – complexity theory, quantum computing

T Andrew S. Tanenbaum – operating systems, MINIX Robert Tarjan – splay tree Shang-Hua Teng – analysis of algorithms

Larry Tesler – human-computer interaction, graphical user interface, Apple Macintosh Avie Tevanian – Mach kernel team, NeXT, Mac OS X Bruce H. Thomas – wearable computers, augmented reality Ken Thompson – Unix Walter F. Tichy – RCS Seinosuke Toda – computation complexity, recipient of 1998 Gödel Prize Linus Torvalds – Linux kernel, Git Godfried Toussaint – computational geometry – computational music therory Joseph F Traub – computational complexity of scientific problems John Tukey – FFT Murray Turoff – computer-mediated communication Alan Turing (1912-1954) – British computing pioneer, Turing Machine, algorithms,

cryptology, computer architecture.

U Jeffrey D. Ullman – compilers, databases, complexity theory

V Leslie Valiant – computational complexity theory, computational learning theory Srinidhi Varadarajan – System X: VirginiaTech's Power Mac G5 Supercluster François Vernadat – enterprise modeling Richard Veryard – enterprise modeling Patrick Valduriez – distributed data management

W Philip Wadler – functional programming David Wagner – security, cryptography Marilyn A. Walker – natural language processing, spoken dialogue systems, intelligent

virtual agents Larry Wall (1954-) – inventor of Perl programming language, study of language structure Manfred K. Warmuth – computational learning theory David H. D. Warren – AI, logic programming, Prolog, the 'W' in WAM Kevin Warwick – artificial intelligence Jie Wu – computer networks Peter Wegner – object-oriented programming, interaction (computer science) Peter J. Weinberger – programming language design, the 'w' in AWK Mark Weiser – ubiquitous computing Joseph Weizenbaum – artificial intelligence, ELIZA Steve Whittaker – Human Computer Interaction, Computer Support for Cooperative

Work, Social Media Jennifer Widom – nontraditional data management Janyce Wiebe – subjectivity, natural language processing, automatic summarization,

Gio Wiederhold – database management systems Adriaan van Wijngaarden – Dutch pioneer; ARRA, ALGOL Mary Allen Wilkes – LINC developer, assembler-linker designer Maurice Vincent Wilkes – microprogramming, EDSAC Yorick Wilks – computational linguistics, artificial intelligence James H. Wilkinson – numerical analysis Sophie Wilson – ARM architecture Shmuel Winograd – Coppersmith-Winograd algorithm Terry Winograd – artificial intelligence, SHRDLU Glynn Winskel – concurrenty theory Event structures Niklaus Wirth – Pascal, Modula, Oberon (programming language) Dennis E. Wisnosky – Integrated Computer-Aided Manufacturing (ICAM), IDEF Stephen Wolfram – Mathematica William Wulf – compilers

Y Edward Yourdon – Structured Systems Analysis and Design Method

Z Lotfi Zadeh – fuzzy logic Arif Zaman – Pseudo-random number generator Albert Zomaya – Australian pioneer of scheduling in parallel and distributed systems Konrad Zuse – German pioneer of hardware and software Mark Zuckerberg – Co-founder and CEO of Facebook