Ess Definition

ĕs
esses
noun
The letter s.
American Heritage
Something shaped like S.
Webster's New World
suffix
Female.
Lioness.
American Heritage
affix
Female [lioness]
Webster's New World
other

The ESS was the first electronic common control (ECC) circuit switch. Developed by AT&T Bell Telephone Laboratories with the assistance of Western Electric, and based on the transistor, invented at Bell Labs in 1948, the ESS involved a development effort that began in earnest in the early 1950s.The first ESS central office (CO) began service in Succasunna, New Jersey, on May 30, 1965, connecting 200 subscribers. By 1974, there were 475 such offices in service, serving 5.6 million subscribers.The development effort was estimated to involve 4,000 man-years and a total cost of $500 million. See also circuit switching, CO, and ECC.

Webster's New World Telecom
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Other Word Forms of Ess

Noun

Singular:
ess
Plural:
esses

Origin of Ess

  • Middle English -esse from Old French from Late Latin -issa from Greek

    From American Heritage Dictionary of the English Language, 5th Edition

  • ME -esse, -isse < OFr -esse < LL -issa < Gr

    From Webster's New World College Dictionary, 5th Edition

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