From: utzoo!decvax!aps Newsgroups: net.trivia Title: Re: Why 407? Article-I.D.: decvax.337 Posted: Thu Nov 11 11:00:56 1982 Received: Fri Nov 12 08:22:03 1982 References: sytek.218 407 (base 8) will branch passed the a.out header on PDP-11's. aps.