- ZTD stands for Zenith Total Delay
- ZTD stands for Zentrum für Testentwicklung und Diagnostik (German: Center for Test Development and Diagnostics; University of Fribourg; Switzerland)
- ZTD stands for Zalkin Training and Development (Denver, CO)
- ZTD stands for Zone Tampon Dynamique (French: Dynamic Buffer Zone; building construction; Canada)
Abbreviations And Their Meaning