There are multiple definitions:

1. apparent total tract digestibility(English)

   • CP, SBM, SID, SPC, STTD
   • Nutrition, Veterinary medicine
   • https://doi.org…7/jas.2016-0505

2. Advanced Technologies & Treatments for Diabetes(English)

   • refers to an annual international conference
   • CGM
   • Diabetes, Medical technology (assessment)
   • https://attd.kenes.com/