Cyber Heroes of the Past

This started as a series of articles for ThemNews, the bimonthly journal of Thematics Southern Africa, covering (in most cases) one Cyber Hero at a time who has contributed to the development of the computer. The first monograph appeared in June 2005. Some of the articles have been published in international philatelic magazines, like Thema and Topical Time.

● Mohammad ibn Musa al-Khawarizmi
        Published in: ThemNews, June 2005, Vol. 6, no.2

● Pope Sylvester II (a.k.a. Gerbert of Aurillac)
        Published in: ThemNews, August 2005, Vol. 6, no.3
        Published (in Dutch) in: Thema (tijdschrift van de Nederlandse Vereniging van Thematische Filatelie), februari 2006, jaargang 19, nummer 1
        Published (in Dutch) in: Phila-Info (tijdschrift van de Postzegelvereniging Philatelica West-Brabant, Nederland), jaargang 8, 3de kwartaal 2008

● Leonardo da Vinci
        Published in: ThemNews, October 2005, Vol. 6, no.4

● Blaise Pascal
        Published in: ThemNews, December 2005, Vol. 6, no.5
        Published (in Dutch) in: Thema (tijdschrift van de Nederlandse Vereniging van Thematische Filatelie), september 2006, jaargang 19, nummer 4

● Gottfried Wilhelm von Leibniz
        Published (in Dutch) in: Thema (tijdschrift van de Nederlandse Vereniging van Thematische Filatelie), november 2005, jaargang 18, nummer 5
        Published in: ThemNews, February 2006, Vol. 6, no.6

● Joseph Marie Jacquard
        Published in: ThemNews, June 2006, Vol. 7, no.2
        Published (in Dutch) in: Thema, februari 2007, jaargang 20, nummer 1

● Charles Babbage
        Published in: ThemNews, August 2006, Vol. 7, no.3
        Published (in Dutch) in: Thema, juli 2007, jaargang 20, nummer 3

● Werner von Siemens
        Published in: ThemNews, October 2006, Vol. 7, no.4
        Published (in Dutch) in: Thema, november 2007, jaargang 20, nummer 5

● Charles Wheatstone
        Published in: ThemNews, December 2006, Vol. 7, no.5

● Jean-Maurice-Émile Baudot
        Published in: ThemNews, June 2007, Vol. 8, no.2
       Published (in Dutch) in: Thema, juli 2008, jaargang 21, nummer 3

● Elmer Ambrose Sperry
        Published in: ThemNews, December 2007 /January 2008, Vol. 8, no.5/6