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  c't 8/2007, S. 86: DSL optimal

  https://web.archive.org/web/20070406184040/http://www.heise.de/ct/07/08/086/

  c't - Magazin für Computertechnik

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  c't 19/2003, S. 35: Digital-Kino

  https://web.archive.org/web/20030919045027/http://www.heise.de/ct/03/19/035/

  c't - Magazin für Computertechnik

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  c't 13/99, S. 66: Wechselplatte

  https://web.archive.org/web/20000817192730/http://www.heise.de/ct/99/13/066/

  c't - Magazin für Computertechnik

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  c't 15/2005, S. 124: Breitband-Zukunft

  https://web.archive.org/web/20060113031207/http://www.heise.de/ct/05/15/124/

  c't - Magazin für Computertechnik

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  c't 6/96, S. 47: Amiga

  https://web.archive.org/web/20000817211904/http://www.heise.de/ct/96/06/047/

  c't - Magazin für Computertechnik

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  c't 13/2002, S. 224: RIAA-Entzerrer

  https://web.archive.org/web/20021118102059/http://www.heise.de/ct/02/13/224/

  c't - Magazin für Computertechnik

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  c't 7/2004, S. 90: heise online

  https://web.archive.org/web/20040402084448/http://www.heise.de/ct/04/07/090/

  c't - Magazin für Computertechnik

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  c't 7/2008, S. 39: Roboking 2008

  https://web.archive.org/web/20080404101022/http://www.heise.de/ct/08/07/039/

  c't - Magazin für Computertechnik

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  c't 7/2005, S. 88: Internet-Infrastruktur

  https://web.archive.org/web/20050319095233/http://www.heise.de/ct/05/07/088/

  c't - Magazin für Computertechnik

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  c't 12/2004, S. 96: c't-Download-Aktion

  https://web.archive.org/web/20040611170601/http://www.heise.de/ct/04/12/096/

  c't - Magazin für Computertechnik

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