Template:Selected anniversaries/March 13
1764: Charles Grey, 2nd Earl Grey born. His government will see the abolition of slavery in the British Empire.
1877: Children reprogram Jacquard loom to compute new family of Gnomon algorithm functions.
Mathematician Melvin Dresher (Dreszer) born. He will contribute to game theory, co-developing the game theoretical model of cooperation and conflict known as the Prisoner's dilemma.
2015: Steganographic analysis of Nikola Tesla illustration unexpectedly reveals "at least a terabyte" of encrypted data, "almost certainly Tesla's case files on crimes against physical constants."
2016: Philosopher, mathematician, and computer scientist Hilary Putnam dies. He argued for the reality of mathematical entities, later espousing the view that mathematics is not purely logical, but "quasi-empirical".