Memorandum from Maury Maverick to Everybody in Smaller War Plants Corporation Posted by guillaume8375 on Saturday April 30, 2016 @06:19AM from the research.archives.gov dept. https://research.archives.gov/id/7788338 ( 1 comment | on HN )
According to http://www.futilitycloset.com/2016/04/29/clear-purpose, this is the first known usage of gobbledygook to refer to obscure jargon.