Jindo Fox writes,"A few years ago, Cory linked to some wonderful pictures in Usborne's 1983 classic Introduction to Machine Code for Beginners. Usborne has made PDF copies available of their whole line, and with the only restriction that you link to their page,not to copy and redistribute the files themselves. Very cool. I fill fond memories of wasting my childhood typing these listings into the mainframe terminal at my local university, and later on my Timex Sinclair 1000, and which I somehow knew was the American version of the ZX-81 that was featured in these pages." (more…)
Source: boingboing.net