| Abbreviation | Definition |
|---|---|
| ACTC | All Ceylon Tamil Congress |
| BATM | Bay Area Tamil Manram |
| BTBF | British Tamil Badminton Federation |
| CTTA | Central Texas Tamil Academy |
| CUTN | Central University of Tamil Nadu |
| DTAL | Diploma in Tamil as an Additional Language |
| DTEA | Delhi Tamil Education Association |
| ENPT | Enai Nokki Paayum Thotta |
| FTIS | France Tamil Ilaignar Sangam |
| GATS | Greater Atlanta Tamil Sangam |
| GCTS | Greater Cincinnati Tamil Sangam |
| GGT | Gamma Glutamil Transferase |
| GMTS | Greater Milwaukee Tamil Sangam |
| GPTM | Greater Portland Tamil Mandram |
| JTM | Jacksonville Tamil Mandram |
| KITC | Kingston Institute of Tamil Culture |
| LTTE | Liberation Tigers of Tamil Eelam |
| LTTE | Liberation Tigers of Tamil Elam |
| MDMK | Marumalarchi Dravida Munnetra Kazhagam |
| MIOT | Medical Institute of Tamils |