Burroughs hand operated adding and listing machine
1917
1917
1917
2000-100 BCE
1934
1955; 1830
1990-96
circa 1917
1772 (original); 1919 (model)
4000-2001 BCE
1934
1917
1801-1892 (prepared); 1946 (element replaced)
1930 (replica); 1834 (original)
1903 (original); 1982 (model)
1830 (original); 1967 (model)
1917
1989-08
1888; 1984
1730; 1967
1952-3
1917
1972-3
2500 BCE
1917
1917
1970-1910
circa 1917
circa 1917
1917
1917
1971-1900
1990-95
1917
1917
1917
1798 (original); 1977 (model)
1965-1900
1859; 1986
1917
1945-50
circa 1917
1917
1916; 1929
3000-1500
1917
1917
3000-2000 BCE
1917
1917
1942-09