dogcow

/dogkow/ , n. See Moof. The dogcow is a semi-legendary creature that lurks
in the depths of the Macintosh Technical Notes Hypercard stack V3.1.
Option-shift-click will cause it to emit a characteristic Moof! or !fooM
sound. Getting to tech note 31 is the hard part; to discover how to do
that, one must needs examine the stack script with a hackerly eye. Clue:
rot13 is involved. A dogcow also appears if you choose Page Setup...
with a LaserWriter selected and click on the Options button. It also
lurks in other Mac printer drivers, notably those for the
now-discontinued Style Writers.