Computer Science as Empirical Inquiry: Symbols and Search, A. Newell and H. A. Simon
Presented by Newell and Simon when they received the 1975 ACM Turing Award at the ACM Annnual Conference in Minneapolis. It is the paper where they formulated the Physical System Hypothesis, an influential but also controversial assumption about AI.
Click a1975-newell_simon.pdf link to view the file.