- DTTC stands for Desmond Tutu Tuberculosis Centre (University of Stellenbosch; Stellenbosch, South Africa)
- DTTC stands for Diploma in Travel and Tourism Consulting
- DTTC stands for Design and Test Technology Conference (Intel Corporation)
- DTTC stands for Digital Thermometer, Timer & Clock
- DTTC stands for Department of Trade, Tourism and Competitiveness
- DTTC stands for Digital Television Transition Coalition (US)
- DTTC stands for Dynamic Temporal and Tactile Cueing for Speech Motor Learning (speech pathology)
- DTTC stands for Deloitte Touche Tohmatsu CPA (Certified Public Accountants) Limited (Beijing, China)
DTTC