Does anyone know the history of the HP 42S owner's manual? It must have converted from spiral bound to hard bound at some point. I was cleaning out some stuff and realized that I have two owner's manuals for my 42S. One is spiral bound and the other is hard bound (soft cover but bound like a paper back book). One was printed 6/88 (spiral) and the other 3/94. Quite frankly, I am not sure where I got the second one. Was there ever a promotion that provided a spiral manual if you registered the calc or something similar???
HP 42S Owners Manual
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