CTL
- CTL Corporation
- CTL timecode
- Centralia, Washington (Amtrak station)
- Champions Tennis League
- Charleville Airport
- Chronic training load
- Circuit Total Limitation
- Coal liquefaction
- Commission de transport de la Ville de Laval
- Communications Technology Laboratory
- Complex Text Layout
- Computation tree logic
- Computer Technology Limited
- Constructive total loss
- Control key
- Cut-to-length logging
- Cytotoxic T cell
- Marmon-Herrington CTLS