Definition from Wiktionary, the free dictionary
See also: Appendix:Variations of "era"
- (baseball) Initialism of “Earned Run Average” (baseball statistic)
- (electronics) Initialism of electrically reconfigurable array.
- (military) Initialism of explosive reactive armor.
- (US) Initialism of Equal Rights Amendment.
- (EU, railways) Initialism of European Railway Agency (called today the European Union Agency for Railways)