| Rank | Abbreviation | Meaning |
|---|
| ***** | CTTL | China Telecommunication Technology Labs
| |
| ***** | CTTL | Center for Technology in Teaching and Learning
| |
| ***** | CTTL | Charge Transfer to Ligand
| |
| **** | CTTL | Chien Tranh Tam Ly
| |
| **** | CTTL | Commission on Technology in Teaching and Learning
| |
| **** | CTTL | cutaneous T-cell lymphoma
| |
| **** | CTTL | Chemical Terminal Trombay Limited
| |
| **** | CTTL | Critical Training Task List
| |
| **** | CTTL | Course Training Task List
| |
| *** | CTTL | Complementary Transistor-Transistor Logic
| |
| *** | CTTL | Callmate Telips Telecom, Ltd.
| |
| ** | CTTL | Center for Technologies in Teaching and Learning
| |
| ** | CTTL | Chevalier Telecom Thailand Ltd
| |
| ** | CTTL | Caribbean Tech Trendz Limited
| |
| * | CTTL | Clandestine Tagging, Tracking, and Locating
| |
| * | CTTL | Commercial and Technical Training Ltd.
| |
| * | CTTL | China Telecommunication Technology Laboratories
| |
| * | CTTL | Call Transfer to Tie Lines
| |
| * | CTTL | Criminal Trespass to Land
| |
| * | CTTL | Citizen Thunderbird Travel Ltd
| |
| * | CTTL | Common Text Transformation Library
| |