Understanding Abbreviations for instruments in qtvlm

Hello,
Please can it be explained to me the background and rationale of the naming convention that qtvlm has chosen for instruments and why they differ so much from what is common in other software and MFDs.
For example:
Depth = dph instead of DBK (depth below keep), DPT = Depth, DWL = depth below waterline
Sea Surface Temperature = STP instead of SST
Destination to Waypoint = DNM destination to mark instead of DTW = Destination to waypoint (this slightly leads to a discussion about marks vs waypoint in navigation overall)

And many others.

I would prefer a consistent unified approach this, but of course I can live with qtvlms approach, I just have to learn. I am interested in the background and history of how it came to be, for my interest.

Many thanks,
Alex