10.1184/R1/6607775.v1 Allen Newell Allen Newell Notes for a model of human performance in ZOG Carnegie Mellon University 2005 Human-machine systems. Artificial intelligence. Computers. 2005-06-01 00:00:00 Journal contribution https://kilthub.cmu.edu/articles/journal_contribution/Notes_for_a_model_of_human_performance_in_ZOG/6607775 Computer Science Department