div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum src=https:reader033fdocumentsusreader033viewer20220512025a80afbd7f8b9a24668c53abhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum src=https:reader033fdocumentsusreader033viewer20220512025a80afbd7f8b9a24668c53abhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb alt=Page 3: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum src=https:reader033fdocumentsusreader033viewer20220512025a80afbd7f8b9a24668c53abhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 4button div class=trans-image amp-img class=trans-thumb alt=Page 4: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum src=https:reader033fdocumentsusreader033viewer20220512025a80afbd7f8b9a24668c53abhtml5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 5button div class=trans-image amp-img class=trans-thumb alt=Page 5: Abacus flip-book - Computer History Museumarchivecomputerhistoryorgresourcesaccesstext201202 · Title: Abacus flip-book Keywords: Collection of the Computer History Museum...