Blue Stuff, I seem to remember that the "Q" abbreviations were introduced to assist in those difficult days of early HF/morse transmissions. You're quite right, there was a huge list of them (QSY = change freq) - maybe a siggie from Kinloss still has his original list on parchment somewhere!
Some are listed at
http://duke.usask.ca/~buydens/ham/qcodes.html