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ACU

Automatic Calling Unit

A system such as a computerized one that originates or "dials" calls automatically

ADSL

Asymmetric Digital Subscriber Line

ADSL Services is a type of digital subscriber line (DSL) technology, a data communications technology that enables fast data transmission over copper telephone lines. ADSL has been surpassed with ADSL2+ and VDSL.

alias

An alternate email address which may redirect to one or more recipients.

For example sales@example.com could deliver mail to john@example.com and jane@example.com.

ANSI

American National Standards Institute

The American National Standards Institute is a private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States.

application

Software program that runs on your computer

An application, or application program, is a software program that runs on your computer. Web browsers, e-mail programs, word processors, games, and utilities are all applications. The word "application" is used because each program has a specific application for the user.

ATA

Analog Telephone Adapter

An Analog Telephone Adapter is designed to connect an analog telephone to a digital telephone system. Usually this device is a small box that has an Ethernet port and at least one FSX port.