Burroughs hand operated adding and listing machine
1917
1917
1915
1915
1918
1917
1916
1915
1915
1915-1917
1955; 1830
1918
1916-1917
1918
2000-100 BCE
1917-1918
1934
1915
1918
1915-1918
1915
1916
1990-96
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
circa 1917
1705-1737
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1915
1915
1916-1918
1830 (original); 1967 (model)
1934
1918
1917
1915-1916
circa 1915
4000-2001 BCE
1917-1918
1839 (original); circa 1988 (replica)
1915-1918
1931-06
1956-09
18 Janury 1948
1918
1917
1915
1918
1953-4
1918