ESM

'ESM' is an acronym. In a military context, it probably stands for
Electronic Support Measures or Electronic Surveillance Measures.
In other contexts, it could mean

★ Early Science and Medicine

★ Earth Science Museum

★ 'Earth System Model', a highly advanced form of Global climate model

★ Eastern Surf Magazine

★ East Syracuse-Minoa Central School District or East Syracuse-Minoa High School

★ Eastman School of Music

★ Ecole de Management et de Communication Geneve

★ Ecole Supérieure de Métrologie

★ Elder Scrolls master, the .ESM file format used in the computer games "" and ""

★ Election Stock Market

★ Electronics Supply & Manufacturing

★ Electronic Support Measures, the military technique of tactical electronic intelligence gathering

★ Elektrostopanstvo na Makedonija

★ Embedded Systems Management

★ Employee Services Management Association

★ Energy Saving Module

★ End System Multicast

★ Engineering Science and Mechanics

★ English Service Ministry

★ Enterprise Security Manager or Enterprise Security Management

★ Enterprise Storage Manager

★ Enterprise Switch Manager or Nortel ESM

★ Enterprise System Management

★ Environmental Science and Management

★ Episcopal Senior Ministries

★ Ernstige Spraak en Taal Moeilijkheden

★ Esmeraldas, Ecuador IATA location identifier

★ European Satellite Multimedia

★ European Simulation Multiconference

★ European Society for Microcirculation

★ European Sports Magazines

★ Extensible System Monitor

★ External Security Manager

★ External Storage Module

★ East Side Mario's (Restaurant)
ESM2 can stand for