| TCL | 0 | Non-numerical Scientific | United States | Tree Command Language | |
| Tcl | 1986 | Terminal Control Language | |||
| Tcl | 1990 | Specialised Languages | United States | Tool Command Language | |
| TCL | 1968 | Other Conversational | United States | Tymshare Conversational Language | |
| Tclmidi | 0 | Musical composition language |