On 05/11/2013 05:39 PM, Mike Loewen wrote: Sure, but a 12-channel tape was common fare for most line printers back when. So this could be from any third-party maker, say, Wright Line, Inmac, etc. I recall the important thing was to make certain that each channel had at least one hole punched. Failing to do so could go through a whole box of paper in no time at all. Some operating systems automatically assumed the first character in a print record was carriage control. A user who forgot that could create a mess of wasted paper. For example, in CDC 6000 SCOPE, one performed an 80-80 listing using the COPYSBF command as in COPYSBF INPUT OUTPUT or just COPYSBF since files INPUT and OUTPUT are assumed as defaults. The command adds a blank to the start of each file. If one forgot the "S" and instead executed COPYBF INPUT OUTPUT a mess was usually the result. --Chuck