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- Ole-Johan Dahl – Simula
- Ajantha Dahanayake – Meta-CASE theory and implementation, Computer aided method Engineering
- Andries van Dam – computer graphics, hypertext
- Christopher J. Date – proponent of database relational model
- Erik Demaine – computational origami
- Tom DeMarco
- Richard DeMillo – computer security, software engineering, educational technology
- Dorothy E. Denning – computer security
- Peter J. Denning – identified the use of an operating system's working set and balance set, President of ACM
- Michael Dertouzos – Director of Massachusetts Institute of Technology (MIT) Laboratory for Computer Science (LCS) from 1974 to 2001
- Alexander Dewdney
- Vinod Dham – P5 Pentium processor
- Jan Dietz (1945 -ι) – information systems theory and "Design & Engineering Methodology for Organizations"
- Whitfield Diffie (1944-χ) – 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 (1901–1987) – 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
Read more about this topic: List Of Computer Scientists