Glenn,
The uniTAB (Qld,SA and NT) meanings for those are:

This column contains information about the past achievements of a runner. The following letters are used:

Letter	Meaning
C	Has won over this distance at this track
D	Has won over this distance at another track
T	Has won at this track over another distance
W	Has won or been placed on a rain-affected track

I hope this helps

__________________
Ever get the feeling that the world is a tuxedo and you are a pair of brown shoes?