1831 census of the Ottoman Empire 1970-01-01
1872 Baltic Sea flood 1970-01-01
1880s in mathematics 1970-01-01
1881–1882 census of the Ottoman Empire 1970-01-01
1885 in mathematics 1970-01-01
189 (number) 1970-01-01
18-electron rule 1970-01-01
18th-century Austrian physicists 1970-01-01
18th-century Hungarian mathematicians 1970-01-01
18th-century Hungarian physicists 1970-01-01
18th-century Lithuanian mathematicians 1970-01-01
18th-century Polish–Lithuanian physicists 1970-01-01
1910 in computing 1970-01-01
1910s in robotics 1970-01-01
1914 in computing 1970-01-01
1920s in robotics 1970-01-01
1929 in computing 1970-01-01
1930s computers 1970-01-01
1936 in computing 1970-01-01
1937 in robotics 1970-01-01