2
votes
2answers
320 views

What is written on the side of the 'mystery key' on a IBM PC 3180 keyboard?

What is written on the side of the 'mystery key' on an IBM PC 3180 keyboard? To be more specific, I'm talking about the text seen here...
200
votes
7answers
12k views

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 ...