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In the context of a computer server, a service is a function that the server provides for other hosts to use.

A service is

[a] mechanism to enable access to one or more capabilities, where the access is provided using a prescribed interface and is exercised consistent with constraints and policies as specified by the service description.[1]

A service is


A service is

an abstract entity consisting of a set of capabilities offered by one or more providers to consumers. The service is provided by means of consumer service requests. The capabilities of the service and information how to use these capabilities are described in a service description. It can be realized by living beings, information systems, machines, etc.[4]


Servicw is "[t]he act of presenting the Summons to the defendant.[5]"

U.S. trademark law[]

In the context of service marks, a service

(1) must be a real activity; (2) must be performed to the order of, or for the benefit of, someone other than the applicant; and (3) the activity performed must be qualitatively different from anything necessarily done in connection with the sale of the applicant's goods or the performance of another service.[6]


  1. NIST Special Publication 800-160, at B-12.
  2. Framework for Cyber-Physical Systems, at 17.
  3. NIST Special Publication 800-160, at B-12.
  4. SOA4All, Glossary (full-text).
  5. USPTO, Glossary (full-text).
  6. See TMEP 1301.01 "What is a service?" for more information on services.