The abbreviation CT stands for:
- Value-added service ( According to the Bundesbank, the definition of CIT companies )
- World Definition Language ( scripting language of the former version of 3D computer game development system 3D Game Studio )
- World Digital Library ( a UNESCO project )
- Waveform Description Language ( Description Language for Software Defined Radio )
WDL is part of the name of:
- WDL Aviation
- WDL airship company GmbH.