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memory typewriter
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An early typewriter that held a few pages of text in its memory and provided limited word processing functions. With a display screen of only one or two lines, editing was tedious.





Its memory wasn't made of magnetic cores or semiconductors. Text was first punched into player piano-like rolls with a typewriter/perforator. As the rolls passed over slots in a bar in this machine, a valve opened and negative pressure in a hose collapsed a small bellows that pulled down the typewriter key. (Image courtesy of TMC/Compco, Inc.)






Typing on this machine recorded the text by punching holes in the rolls. (Image courtesy of TMC/Compco, Inc.)






This explains the fabulous AUTO-TYPIST procedure for the prospective customer. Throughout the 1940s and up until the mid-1970s, AUTO-TYPIST machines like this one from the American Automatic Typewriter Company provided reliable document processing. (Image courtesy of TMC/Compco, Inc.)





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