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Dyadic ⎕MONITOR means

Set Monitor Controls

      +(0,⍳10) ⎕MONITOR 'FOO'
0 1 2 3 4 5

Monadic ⎕MONITOR means

Query Monitor Controls

      ⎕MONITOR 'FOO'
0 1 1418 1000 0
1 1   83    0 0
2 1  400    0 0
3 1  397    0 0
4 1  467 1000 0
5 1  100    0 0

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