Though I'm not sure if it was
"On the eighteenth of April, in Seventy-Five"
I suspect that
"Hardly a man is now alive
Who remembers that famous day and year"
... when shared segments were implemented in VM.
It seems to me that it predated the VM/370 SEPP/BSEPP days when I started, but
there's been many a synapse lost since then.
Google, Wikipedia, ibm.com, and even Melinda's wonderful work have not been
revealing, so I thought perhaps might be an old gray-beard like myself (with a
better memory) still reading this list.
Any help?
-Chip-