Questions tagged [mainframe]

Used for what are generally considered large-scale servers from IBM, Unisys, Fujitsu, Hitachi, and Bull.

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Purpose of a "mystery key" on an IBM PC 3270 keyboard

A colleague has just come into possession of a large number of IBM PC 3270 keyboards (don't ask!). These keyboards have a number of very interesting looking keys, but the one that most intrigued us ...
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