I learned yesterday that Ken Thompson used to host readings of Unix source code at Berkeley where they would go through the code line-by-line (https://www.salon.com/2000/05/16/chapter_2_part_one/): >And from the very beginning, Unix benefited from a communal vibe that spread directly from its creators, Ritchie and Thompson. > > Fabry recalls grasping the hidden wonders of Unix one week in 1975 when Thompson conducted a "reading" of Unix over several successive nights. > >"The first meeting of the West Coast Unix User's Group had about 12 or 15 people," recalls Fabry, a mild man, now 60 years old, who clearly delights in his 25-year-old memories. "We all sat around in Cory Hall and Ken Thompson read code with us. We went through the kernel* line by line in a series of evening meetings; he just explained what everything did ... It was wonderful."