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use of calculating machines I observed people using hand-held versions of four-function loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220807185f78b2e7f146b54d0b055689html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=2015-11-23-let-me-briefly-review-some-of-my-observations-on-peoples-use-of-calculatinghtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: WordPresscom · 2015-11-23 · Let me briefly review some of my observations on peoples use of calculating machines I observed people using hand-held versions of four-function loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220807185f78b2e7f146b54d0b055689html5thumbnails3jpg 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my observations on peoples use of calculating machines I observed people using hand-held versions of four-function loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220807185f78b2e7f146b54d0b055689html5thumbnails5jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=6Page 6button div class=ts-imageimg data-url=2015-11-23-let-me-briefly-review-some-of-my-observations-on-peoples-use-of-calculatinghtmlpage=6 data-page=6 class=ts-thumb lazyload alt=Page 6: WordPresscom · 2015-11-23 · Let me briefly review some of my observations on peoples use of calculating machines I observed people using hand-held versions of four-function loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC 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