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DEHOMAG was a German subsidiary of IBM
IBM
with monopoly in the German market before and during World War II
World War II
. The word was an acronym for _Deutsche Hollerith-Maschinen Gesellschaft mbH_ (English: German Hollerith Machines LLC). _Hollerith_ refers to the German-American inventor of the technology of punched cards , Herman Hollerith .

CONTENTS

* 1 Background * 2 History * 3 Holocaust
Holocaust
* 4 See also * 5 References * 6 Further reading

BACKGROUND

A general-purpose punched card from the mid twentieth century.

The technology of punched cards dates back to to the 18th century when it was used for mass production of woven textiles and later used as a recording and playback system in player pianos. The use of punched cards for recording and tabulating data was first proposed and used by Semen Korsakov around 1805. In 1832 Charles Babbage proposed using similar cards to program and to store computations for his calculating engine. Punched card
Punched card
technology was further developed for data-processing by Herman Hollerith from the 1880s. It was used for the 1890 United States Census and for the census work of several foreign governments.

HISTORY

Willy Heidinger , an acquaintance of Hollerith, licensed all of Hollerith’s The Tabulating Machine Company patents in 1910, and created Dehomag
Dehomag
in Germany. In 1911 The Tabulating Machine Company was amalgamated (via stock acquisition) with three others, creating a fifth company, the Computing-Tabulating-Recording Company (CTR). In 1923 CTR acquired 90% ownership of Dehomag, thus acquiring patents developed by them. In 1924 CTR was renamed IBM
IBM
.

HOLOCAUST

As an IBM
IBM
subsidiary, Dehomag
Dehomag
became the main provider of computing expertise and equipment in Nazi Germany
Germany
. Dehomag
Dehomag
gave the German government the means for two official censuses of the population after 1933 and for searching its data. It gave the nazis a way of tracing Jews
Jews
and dissidents using the powerful automated search tools using the IBM
IBM
machines. It enabled them to search databases rapidly and efficiently, and the methods were used throughout occupied Europe by the Gestapo
Gestapo
and others to locate and arrest its victims, so contributing to the Holocaust
Holocaust
.

Dehomag
Dehomag
leased and maintained the German government's punched card machines. Dehomag
Dehomag
general manager for Germany, Hermann Rottke, reported to Thomas J. Watson in New York. IBM
IBM
established a special subsidiary, Watson Business Machines, to deal with railway traffic in the General Government
General Government
during the Holocaust
Holocaust
in Poland . The German Transport Ministry used IBM
IBM
machines under the New York-controlled subsidiary in Warsaw, not the German subsidiary. It was legal for IBM to conduct business with Germany
Germany
directly until America entered the war in December 1941.

SEE ALSO

* International subsidiaries of IBM
IBM
* History of IBM
IBM
* IBM
IBM
during World War II
World War II

REFERENCES

* ^ Edwin Black
Edwin Black
on IBM
IBM
and the Holocaust * ^ Aspray (ed.), William (1990). _ Computing
Computing
Before Computers_. Iowa State University Press. p. 137. ISBN 0-8138-0047-1 . CS1 maint: Extra text: authors list (link ) * ^ Black, Edwin (2001). _ IBM
IBM
and the Holocaust
Holocaust
: the strategic alliance between Nazi Germany
Germany
and America's most powerful corporation_ (1. ed.). New York: Crown Publishers. ISBN 0609607995 .

FURTHER READING

* Black, Edwin (2001). _ IBM
IBM
and the Holocaust
Holocaust
: The Strategic Alliance between Nazi Germany
Germany
and America's Most Powerful Corporation'_ ISBN 0-609-60799-5 * Anita Ramasastry . A Swiss court allows Gypsies\' Holocaust lawsuit to proceed. CNN
CNN
, 2004-07-08. * Dehomag
Dehomag
D11 tabulation machine exhibit in the United States Holocaust
Holocaust
Memorial Museum at the Wayback Machine (archived October 26, 2004)

AUTHORITY CONTROL

* GND : 1079895-X

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Dehomag
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