TMX
The abbreviation TMX stands for:
- Timimoun Airport (IATA code), a regional airport in Timimoun, Algeria
- Telmex (NYSE: TMX), a Mexican telecommunications company
- Toronto Stock Exchange the largest Canadian stock exchange
- Translation Memory eXchange , an XML-based markup language for exchanging data between different translation programs
- Trans Mountain Expansion (TMX) Project, planned expansion of the Trans Mountain Pipeline in Canada