Computers and Automata by Claude Shannon - https://fermatslibrary.com/s/computers-and-automata https://fermatslibrary.com/s/computers-and-automata. Absolutely

Computers and Automata by Claude Shannon - https://fermatslibrary.com/s/computers-and-automata https://fermatslibrary.com/s/computers-and-automata. Absolutely fantastic paper summarizing the field of automata in the 1950s. Amazing how amazing of a surveyor Shannon was. I wish there was a present-day analog for the field now.