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The wanderer above the sea of fog, Caspar David Friedrich, 1818.

Marcel Douwe Dekker (Mdd) (Delft 1964), Dutch systems engineer and conceptual artist, who participates in the Dutch and English Wikipedia, Wikicommons, Wikiquote, Wiktionary and Wikisource since September 2004.

Wikipedia contributions[edit]

Listing of articles created, rewritten and/or significantly expanded:

Modeling, visualization and its history[edit]

General diagram shapes.

Thematic articles:

And biographical articles, new or largely improved:

Templates & categories:

Organizational theory, psychology, sociology, economy, husbandry[edit]

Thematic articles:

Biographical articles, new and/or largely improved:


History of management, theorists, executives, engineers, agriculturists, economists and others:

Systems engineering, software engineering & enterprise engineering[edit]

Overview of data modeling context.

Thematic articles:

And biographical articles, new and or largely improved:




Systems sciences, operations research, econometrics, methodology and more[edit]

Systems thinking about the society based on Malotaux (1985).

Thematic articles:

Biographical articles:


Books and journals:




Some more about art[edit]


More general[edit]

Noia 64 apps karm.svg This user has been on Wikipedia for 12 years and 17 days.
Nohat-logo-XI-big-text.png User:Mdd is one of the most active Wikipedians on English Wikipedia.
45,752+ This user has made more than 45,752 contributions to Wikipedia.
124,658 This user has made over 100,000 contributions to Wikimedia projects.
Wikipedia Autopatrolled.svg This user has autopatrolled rights on the English Wikipedia. (verify)
Editor - bufonite star.jpg This editor is a Master Editor III
and is entitled to display this
Bufonite Editor Star.


This user is a member of the WikiProject Systems.


Documentary pictures[edit]

Global illustration for metamodelling[edit]

Enterprise modelling illustrations[edit]

Software development illustrations[edit]

See also[edit]

External links[edit]