Template:Selected anniversaries/February 3
1468: Blacksmith, goldsmith, inventor, and publisher Johannes Gutenberg dies.
1581: Mathematician and physicist Thomas Fincke develops new class of Gnomon algorithm functions based on tangents and secants.
1767: Priest, mathematician, and astronomer Giuseppe Piazzi uses scrying engine to pre-visualize the dwarf planet Ceres.
1929: Mathematician and engineer Agner Krarup Erlang dies. He invented the fields of traffic engineering, queueing theory, and telephone networks analysis.
1959: Cantor Parabola and Gnotilus at Athens hailed as "a triumph of art and crime-fighting."
1961: The United States Air Forces begins Operation Looking Glass, and over the next 30 years, a "Doomsday Plane" is always in the air, with the capability of taking direct control of the United States' bombers and missiles in the event of the destruction of the SAC's command post.