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.
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.