Download Historische Notizen zur Informatik by Friedrich L. Bauer PDF

By Friedrich L. Bauer

Der Autor entwickelt unterhaltsam, gleichzeitig mit mathematischer Strenge, zahlreiche Facetten aus der Wissenschaftsgeschichte, die mit den Anfängen der Informatik in Zusammenhang stehen. Die Beiträge sind über viele Jahre im Informatik Spektrum erschienen und werden nun erstmals in einem Buch zusammengefasst. Die Informatik selbst ist eine junge Wissenschaft, deren Wurzeln tief in die Vergangenheit zurückreichen. Der Autor zeigt dies anhand vieler anregender historischer Notizen.

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Februar 1923, das US Patent wurde unter der Nummer 1657411 erteilt. An Vorschl¨ agen f¨ ur Schl¨ usselmaschinen unter Benutzung von Schreibmaschinen fehlte es zu dieser Zeit nicht. Die Erfindung’ bestand darin, u ¨ber die Tasten Kappen zu stecken, die andere Alphabetzeichen trugen. Ein o¨sterreichisches Patent nr. 1911 Serge Kanschine und Emil Jellinek-Mercedes zugesprochen. November 1915 ein ¨osterreichisches Patent nr. 70448 f¨ ur eine funktionell gleichwertige L¨ osung; das US Patent 1086823 war ihnen am 10.

Mit vier Ziffern-Rotoren gab das immerhin 10000 Sub- Scherbius und die ENIGMA 49 stitutionsalphabete, die mit Hilfe vierer, an einem Ablesefenster sichtbarer Schl¨ usselbuchstaben eingestellt werden konnten. Die Weiterschaltung der Rotoren zwecks Wechsel der Substitution solle u ¨brigens, wie schon in der Scherbiusschen Patentanmeldung von 1918 steht, ,,m¨ oglichst unregelm¨ aßig“ erfolgen. Im u ¨brigen ging Scherbius bald zu Buchstaben-Rotoren u ¨ber. “ Jedoch wollte der Admiralstab von einer Beschaffung absehen, ,,weil vorl¨aufig bei der Art des Marine-Schl¨ usselverkehrs die Anwendung von Maschinen nicht lohnen w¨ urde“.

Jedoch wollte der Admiralstab von einer Beschaffung absehen, ,,weil vorl¨aufig bei der Art des Marine-Schl¨ usselverkehrs die Anwendung von Maschinen nicht lohnen w¨ urde“. “ Das war vorl¨ aufig das Ende amtlicher Bem¨ uhungen. Scherbius verfolgte den Gedanken einer kommerziellen Nutzung der Erfindung. -Ing. E. , Berlin NW 6 , Schiffbauerdamm 30. Scherbius schreibt 1923, daß die Entwicklung der kommerziellen Maschine durch die Fa. Scherbius & Ritter in Berlin-Wannsee erfolgte, die Fertigung jedoch durch die Fa.

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