Like all professions, the profession of teaching English is full of acronyms. Some you'll come across freqently, such as ELT, EFL and TEFL. Others are less common, or perhaps only common in writing (such as NNS). Two of the unofficial acronyms listed here are EDNAS and TENAR.
http://teaching-english-in-japan.net/acronyms (listed 2002-03-02) [More like this]