noun
Express Mail Service (international); EMS
Official name for the international express postal service; often abbreviated as EMS.
国際スピード郵便で書類を送りました。
I sent the documents by Express Mail Service.
EMSは国際スピード郵便の略称です。
EMS is the abbreviation for Express Mail Service.
Compound of 国際 (international), スピード (speed), and 郵便 (mail), directly describing the international express mail service.