- NTD
- Neural Tube Defect (Medical » Physiology)*** National Transit Database (Governmental » US Government)*** National Transit Database (Governmental » Transportation)* Neutron Transmutation Doping (Academic & Science » Electronics)* National Theatre of the Deaf (Community » Non-Profit Organizations)* NASA Test Director (Governmental » NASA)* National Training Director (Business » International Business)* No Time Delay (Academic & Science » Electronics)* North Texas Division (Business » Firms)* North Texas Division (Governmental » State & Local)* No Time Delay Electronics (Business » Firms)* No Transmit Diversity (Computing » Telecom)
Abbreviations dictionary. 2012.