from
Jargon File (4.4.4, 14 Aug 2003)
dogcow
/dog'kow/, n.
See {Moof}. The dogcow is a semi-legendary creature that lurks in the
depths of the Macintosh Technical Notes Hypercard stack V3.1. The full
story of the dogcow is told in technical note #31 (the particular
dogcow illustrated is properly named `Clarus'). 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. See
http://developer.apple.com/products/techsupport/dogcow/tn31.html.