Vintage calculator question...

Hey folks... this isn't REALLY off-topic because, as everyone knows by now, I only collect calculators that also have PDA functions... i.e. computers. My latest find is a Sharp EL-8160, circa 1978/1979. This isn't the "first" PDA, but it's still a (very) early example. I can make it display letters on the screen, but I can't figure out how to make it save the data. I know the function works because, when it came in the mail and I turned it on, there was some former owner's memo on the screen! Does anyone have, or did anyone once own, a Sharp EL-8160? If so I could use a manual or some help. - Evan ===== Tell your friends about the Computer Collector E-mail Newsletter! -- It's free and we'll never send spam or share your email address -- Publishing every Monday(-ish), ask about writing for us -- Mainframes to videogames, hardware and software, we cover it all Visit the museums directory and read about past events at our web site: http://news.computercollector.com Contact us at news(a)computercollector.com 570 readers and counting!