And apparently it doesn't spark joy
"It's the 1980s, and legacy systems are already a problem. IBM is still shipping source code for big-iron internals, says this mainframe pilot fish.
'IBM discontinued supporting BTAM under CICS, but we had a major customer who communicated via CICS BTAM,' fish says.
Translation: The big customer uses the CICS transaction-processing system, and connects to it over telecommunication lines using the very old BTAM protocol - and IBM has just stopped supporting that approach.
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