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Marcel Douwe Dekker (Mdd) (Delft 1964), Dutch systems engineer and conceptual artist participating in Wikipedia, Wikicommons, Wikiquote and Wiktionary started at the Dutch Wikipedia in September 2004.

Commons contributions : Galleries[edit]

Main Chart, Diagram, Map and Technical drawing
Management and economics
Main Economic diagram, Management diagram
Systems and software engineering
Technology and technical visualisation
Other topics


Commons contributions : Images[edit]

Software and enterprise engineering illustrations[edit]

Philosophy of science illustration[edit]

Documentary pictures[edit]

Commons contributions : Categories[edit]


Scientific books

Scientists categories

Systems theory

Systems theory categories

Systems engineering Categories

Software engineering

General categories

Specific software engineering diagram categories


General categories

Specific categories

Visualization history



See also[edit]

External links[edit]