page_title: Semyon Korsakov
section_title: Inventions
hierarchical_section_title: Semyon Korsakov / Inventions
caption_attribution_description: Drawing of ideoscope
context_page_description: Semyon Nikolaevich Korsakov was a Russian government official, noted both as a homeopath and an inventor who was involved with an early version of information technology.
context_section_description: While working in the statistics department of the Police Ministry, Korsakov became intrigued with the possibility of using machinery to "enhance natural intelligence".  To this end, he devised several devices which he called "machines for the comparison of ideas".  These included the "linear homeoscope with movable parts", the "linear homeoscope without movable parts", the "flat homeoscope", the "ideoscope", and the "simple comparator".  The purpose of the devices was primarily to facilitate the search for information, stored in the form of punched cards or similar media (for example, wooden boards with perforations).  Korsakov announced his new method in September 1832, and rather than seeking patents offered the machines for public use.
  The punch card had been introduced in 1805, but until that time had been used solely in the  textile industry to control looms.  Korsakov was reputedly the first to use the cards for information storage.
  Korsakov presented his ideas to the Imperial Academy of Sciences in St. Petersburg, but their experts rejected his application, failing to see the potential of mechanizing searches through large stores of information.  His machines were largely forgotten until after the Second World War, when a revival of historical interest resulted in the publication (in 1961) of several documents from the Academy's archives relating to Korsakov's machines and the uncovering of a book about them written by Korsakov himself.
caption: The ideoscope (from a drawing by Korsakov)
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