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.
● Mark Shuttleworth
Published in: ThemNews, February 2004, Vol. 4, no.6
Published in: Philamath, October 2007, Vol.XXIX, no.2
● 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
Published in: Philamath, July 2013, Vol.XXXV, no.1
● 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
Published in: PhilaMath - A Journal of Mathematical Philately, April 2016, Vol. XXXVII, no.3
● Charles Wheatstone
Published in: ThemNews, December 2006, Vol. 7, no.5
Published (in Dutch) in: Thema, november 2008, jaargang 21, nummer 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
Published (in Dutch) in: Thema, november 2009, jaargang 22, nummer 5
● Lord Kelvin (William Thomson)
Published in: ThemNews, August 2008, Vol. 9, no.2
Published (in Dutch) in: Thema, april 2009, jaargang 22, nummer 2
● Valdemar Poulsen
Published in: ThemNews, February 2009, Vol. 9, no.4
● Karel Čapek
Published in: ThemNews, November 2008, Vol. 9, no.3
Published (in Dutch) in: Thema, juli 2010, jaargang 23, nummer 3
● Thomas John Watson, Sr.
Published in: Topical Time (under the
title "Thomas John Watson, Sr. - Super Salesman and Cyber Hero"),
July-August 2008, Vol. 59, no.4, Whole Number 350
Published in: ThemNews, August 2009, Vol. 10, no.2
Published (in Dutch) in: Filatelie, februari 2010, jaargang 88, nummer 989
● John von Neumann
Published in: ThemNews, August 2010, Vol. 11, no.2
Published (in Dutch) in: Thema, september 2014, jaargang 27, nummer 4
● Herman Hollerith
Published in: Topical Time (under the
title " Hollerith's Punch Cards"), January-February 2008, Vol. 59, no.1, Whole Number 347
Published in: ThemNews, August 2011, Vol. 12, no.2
Published (in Dutch) in: Thema, februari 2013, jaargang 26, nummer 1
● Walter Houser Brattain
Published in: ThemNews, August 2013, Vol. 14, no.2
● John Bardeen
Published in: Philamath, October 2008, Vol. XXX, no.2.
Philamath - a journal of mathematical philately is the quarterly journal of the
Mathematical Study Unit (MSU)
of the American Topical Association.
● Grigore Constantin Moisil
Published in: Philatelica.ro, June 2009, Vol. 1, no.2.
Philatelica.ro
- a new Romanian philatelic journal.
● William Seward Burroughs
Published in: ThemNews, August 2015, Vol. 16, no.2.
● "Amazing Grace" Murray Hopper
Published in: ThemNews, November 2011, Vol. 12, no.3
● Camillo Olivetti
Published in: ThemNews, May 2011, Vol. 12, no.1
● Ştefan Odobleja
Published in: Philatelica.ro, December 2009, Vol. 1, no.5.
● Leonardo Torres y Quevedo
Published (in Dutch) in: Thema, juni 2013, jaargang 26, nummer 3
Published (in Dutch) in: De Schaakkoerier, december 2013, nummer 129
● John Adam Presper Eckert Jr.
Published in: ThemNews, May 2016, Vol. 17, no.1
● Alan Mathison Turing
Published (in Dutch) in: Thema, april 2011, jaargang 24, nummer 2
Published in: Philamath, April 2012, Vol.XXXIII, no.4
● Arthur Charles Clarke
Published in: ThemNews, June 2012, Vol. 13, no.1
● Galileo Galilei
Published in: ThemNews, November 2012, Vol. 13, no. 3
● Viktor Mikhailovich Glushkov
● Thomas John Watson, Jr.
Published (in Dutch) in: Filatelie, juli/augustus 2011, jaargang 89, nummer 1005
Published in: ThemNews, February 2013, Vol. 13, no. 4
● Timothy John "Tim" Berners-Lee
Published in: ThemNews, August 2014, Vol. 15, no. 2
● Steven Paul Jobs
Published (in Dutch) in: Filatelie, februari 2012, jaargang 90, nummer 1011
Published in: ThemNews, September 2012, Vol. 13, no. 2
● Henry Edward "Ed" Roberts
Published in: ThemNews, November 2014, Vol. 15, no. 3