This is called "oral history" - there is collection of transcripts from Ritchie and other Unix pioneers [1] and another large collection at the Computer History

This is called "oral history" - there is collection of transcripts from Ritchie and other Unix pioneers [1] and another large collection at the Computer History Museum [2] 1. https://www.princeton.edu/~hos/Mahoney/unixhistory.htm https://www.princeton.edu/~hos/Mahoney/unixhistory.htm 2. http://www.computerhistory.org/collections/oralhistories/ http://www.computerhistory.org/collections/oralhistories/