An acquaintance wrote his thesis about Setun and later (2007) published a book about it: http://www.irmielin.org/setun-an-inquiry-into-the-soviet-ternary-comput

An acquaintance wrote his thesis about Setun and later (2007) published a book about it: http://www.irmielin.org/setun-an-inquiry-into-the-soviet-ternary-computer/ http://www.irmielin.org/setun-an-inquiry-into-the-soviet-ter...