Francis E. Dec (January 6, 1926 – January 21, 1996) was a U.S. lawyer from Hempstead Village, New York, disbarred for fraud in 1959, and later known for the bizarre socio-political tracts of conspiracy theories he mass-mailed to the media. Often denouncing a "Worldwide Mad Deadly Communist Gangster Computer God" mind-controlling mankind, Dec is considered to have been a paranoid schizophrenic of the influencing-machine delusion kind, and is often referred to as a "kook".
Not unlike Ed Wood, Dec later became a cult figure referenced in underground culture. He was the subject of a 1994 book chapter, a 1998 comics, and a 1999 stage play; he also made his way into the folklores of the Discordians and the Church of the SubGenius. His rants have been reprinted in a 1983 issue of Robert Crumb's magazine Weirdo and circulated since 1986 from recordings by KROQ-FM host Doc Britton; they have been sampled in 1991 and 2004 by Psychic TV, in 2004 by Venetian Snares, and inspired a Coldcut album in 2005; they have been archived as outsider art by UbuWeb and WFMU; they spawned a fanclub and website; they have also been used as a gauge in 1994 for "kook typography" and in 1998 for the entropy of the undeciphered Voynich manuscript.