On Sun, 2026-03-01 at 16:23 -0600, Jay Jaeger via cctalk wrote: > Keeping such things only on cards would have been very risky, and > also > very hard to deal with when implementing any kind of structured > change > control, which I cannot imagine not being in place for either IBSYS > or > PR-155.
I understand (perhaps not accurately) that IBM had a "master card file," maybe in Poughkeepsie. Did it actually exist? What was in it?
