|Categories||Signals , Signal generation & recording , Audio recording , Engineering and society , Military applications , World War I , World War II , Law & government , Patents , Computing and electronics , Computing , People and organizations , Corporations , News|
"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
|16:49:07, 21 November 2014 +|
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