- DTCL stands for Dhrupadi Techno Consortium Limited (Bangladesh)
- DTCL stands for Office of Defense Trade Controls Licensing (US State Department)
- DTCL stands for David Thomas Contact Lenses (Northampton, England, UK)
- DTCL stands for Driving Trailer Composite Lavatory (train car; UK)
- DTCL stands for Dhaka Telephone Company Ltd. (Bangladesh)
- DTCL stands for Double-Take Command Line
- DTCL stands for Diagnostic Technologies Corporation Ltd. (London, England, UK)
DTCL