@tim re memory patterns. On the old mainframes (#ibm360, #pdp10, #Univac110) we would get core dumps in a 4 to 6 or 8 inch thick stack of Z-fold printer paper. 132 chars wide and lines to fit the page height. Visual pattern matching was an absolutely essential skill when it came to finding interesting data. Eventually we got glass terminals and interactive tools that presaged the modern debuggers in use today.