The New York Stock Exchange started out as a coffee house.
ECH (uncountable)
(chemistry) Initialism of epichlorohydrin.
ECH (plural ECHs)
(military, US) Initialism of Enhanced Combat Helmet.
• CHE, EHC, che
Source: Wiktionary
20 April 2024
(adjective) of an electrical system that uses or generates two or more alternating voltages of the same frequency but differing in phase angle
The New York Stock Exchange started out as a coffee house.