English abbreviations from ctss to cu
- CTSS (Compatible Time-Sharing System)
- CTS-WAN (Conformance Testing Services for WAN)
- CTT (Challenger training tank)
- CTT/H-R (Commander's Tactical Terminal (Hybrid) Receive Only)
- CTTF (Central Test and Training Facility)
- CTT-H (Commander's Tactical Terminal (Hybrid))
- CTTI (Center for Technology Transfer and Integration)
- CTTP (California Tribal TANF Partnership)
- CTTS ((celestial object) Classical T-Tauri Star)
- CTU (Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24))
- CTV (Canadian Television Network)
- CTVC (Churches Television Centre)
- CTVN (Cornerstone TeleVision Network)
- CTVT (Canine Transmissible Venereal Tumour)
- CTVU (Central TV Unit)
- CTW (Cottonwood Airport (FAA: P52))
- CTWG (Communications Transition Working Group)
- CTX (Cortland County Airport (Chase Field, FAA: N03))
- CTY (Cross City Airport)
- CTZ (Sampson County Airport)
- cu (Old Church Slavonic language (ISO 639-1 code))
