Bins of bits
After careful review we have decided not to use the great and terrible BANCStar at work.
...within a few weeks I was reading and writing the code, with the aid of every BANCStar programmer's favorite tools: a dot-matrix printer, lots and lots of different color highlighters, and a three-ring binder called the Prompt File, stuffed with printouts of the dozens of tables in the system, and religiously updated anytime anyone changed anything of significance. (I wasn't kidding about reusing storage; if you needed a constant integer 1000, and you could find a place where somebody else had once used that same value, you linked your code to his and hoped it never changed.)