electronics manufacturing service: a type of OEM (original equipment manufacturer) service.
"The designer adjusted the spacing by adding two ems to separate the paragraphs effectively."
plural of em
In plain English: Ems are invisible units of measurement used by doctors to calculate radiation doses for cancer treatment.
"The designer needed to adjust all the ems in her typesetting software before printing the brochure."
A river in northwestern Germany.
"The ems flows through the lower Saxony region of northwestern Germany before joining the Weser River."
The word ems comes from the German river name Ems, which itself was derived from the Roman Latin term Amisia. This geographical origin traveled into English to refer to a unit of measurement equal to four en spaces or one-third of an inch.