| ERT | Équipe de Recherche Technologique | In French | → Engineering, technology |
| ERT | Europe Recherche Transport | In French | → Transport and postal services |
| ERT | Esperanto-Rondo de Toronto | In Esperanto | → Organizations and associations |
| ERT | Ellinikí Radiofonía Tileórasi (www.ert.gr) = ΕΡΤ | Ελληνική Ραδιοφωνία Τηλεόραση | In Greek |
In Greek | → Telecommunications |