Greetings,  I have inquired of a friend in Florida about the QRS topic
that has been popular in the past few weeks.  The following is his
answer, obtained from one of the company officials.  Hope this helps.

  "Your question is one that I have already asked of my 'contact.'
I have been informed that no one is really sure but she thinks that
the mail slot is the one that bears the most credence.

  "When QRS started out they did, in fact, have a mail slot system to
distribute incoming orders.  The most obvious place for piano rolls was
the "R" slot.  As business grew that slot received more mail than could
be handled, so overage was put in the seldom used "Q" slot.  When both
of those slots were experiencing space problems someone just dumped
things in the next closest slot to the "R," the "S" slot.  That is what
I was told."

Donald Landstrom
Columbus, Ohio