clien-, client-

(Latin: follower, retainer)

1. Someone or an organization taking advice from an attorney, accountant, or other professional person.
2. A person or organization to whom goods or services are provided and sold.
3. A user of the services offered by a social services agency.
4. A or entity dependent on the protection or patronage of someone else or an entity.
5. A computer program that obtains data from a program on another computer, often one which is linked on a network.
1. A relation of a client to a patron.
2. A social system in which free commoners receive the patronage of wealthy or influential aristocrats.

It was common in ancient Rome and has become a feature of some modern societies.

A reference to someone who is dependent on or under the protection of another person.
clientele (s) (noun), clienteles (pl) (usually used in the singular)
1. The clients or customers of a professional organization or business, considered as a group: As a doctor, Adam's patients, or clientele, include a wide range of different ages, genders, and races.

James is a psychologist who has a significant clientele of people who utilize his ways of solving mental and/or emotional problems.

2. Supporters or eager participants: Jason’s football team at school was always very well attended by a huge clientele of fans who continually cheered loudly whenever the athletes scored a touchdown.
A group of clients of an organization or professional people.
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A group of custors of a businness.
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A description of the relationship between two computer programs in which one program, the client, makes a service request from another program, the server, which fulfills the request.

Although the client-server idea can be used by programs within a single computer, it is more important in a network. In a network, the client-server model provides a convenient way to interconnect programs that are distributed efficiently across different locations.

Computer transactions using the client-server model are very common; for example, to check a bank account from a computer, a client program in the computer forwards the request to a server program at the bank. That program may in turn forward the request to its own client program that sends a request to a database server at another bank computer to retrieve the account balance.

The balance is returned back to the bank data client, which in turn serves it back to the client in the personal computer, which displays the information requested.

1. The condition of a client.
2. A state of being under the protection of a patron.