One of these days, when I have time, I'll go into one of the more bizarre COBOL implementations, involving inter-process communication with "chains" of modules being resident either wholly or in part in one of several mainframes or in bulk core, with comm links extending throughout the US.
cf. "Zodiac" done for the USAF Logistics Command. Huge failure, but oh my stars and garters, what a project! 1500 GSA programmers, all writing COBOL, with 70 vendor support people. It was fun, even if it did get Proxmire's "Golden Fleece" award for two years running... --Chuck