⎕SVQ Shared Variable Query

This system function is used to query the processors available, or to establish the existence of any names offered by the processor identified. If used with an empty vector right argument, the result is a vector of processors with share offers outstanding. Used with a right argument which is the number of a processor, the result is a matrix of names offered by that processor.

             ⎕SVQ ''
       1                             (Processor 1 is available)