I think some of the variety name abbreviations can be confusing than convenience.
Take BB, as an example :
Better Boy, Bloody Butcher, Brandy Boy, Big Beef, Big Boy.
On DTM = Days To Maturity. What is "maturity" . To me it is whem plant is grown to size that can flower, etc.
I have seen "DTH" = Days To Harvest. Now that make more sense to me than DTM.
YMMV :-)
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