This is valuable info and made me wonder if the paper tape graphic was only a fake. I'm pretty sure there are at most six holes per channel but as I recall it violates the other standards you mentioned (the sprocket holes are halfway between the two middle data tracks and their centers are aligned). No, it's much earlier than that (1968?) and it's British. It may have been wrotten by Her Majesty's Stationery Office (not registered by them, written by them). The book's at home so I can't check any of those facts now. It describes Linotype machines, Monotype machines, and various filmsetters (with pictures, diagrams, and descriptions of features); it has a pretty detailed discussion of character sets and keyboards, including stenographic and chorded keyboards; it has very useful information about tape codes (including how to cram data that may use as many as 15 or 30 bits per item onto narrower tape); and it has lots of other trivia about specialized devices, information flow in a print shop, the niceties of book formatting, some of the contemporary computer hardware and software, how Random House typeset one of their dictionaries; and so on. In short, I'm becoming very glad that I bought it. :) -- Derek

What did it say? -- Derek