div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentabacus-flip-book-computer-history-abacus-flip-book-keywords-collection-of-thehtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsusreader033viewer20220512025a80afbd7f8b9a24668c53abhtml5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentabacus-flip-book-computer-history-abacus-flip-book-keywords-collection-of-thehtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsusreader033viewer20220512025a80afbd7f8b9a24668c53abhtml5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentabacus-flip-book-computer-history-abacus-flip-book-keywords-collection-of-thehtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...