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Atomized

A liquid is atomized when it is broken into tiny droplets of the liquid, much like a mist or spray form.

ATRA

An acronym for Automatic Transmission Rebuilders Association.

ATS

Air temperature sensor or altitude trim solenoid.

ATS-AS

Altitude trim solenoid/air sensor.

Attenuation

The decrease in the strength of a signal as it passes through a control system.

Attenuator

A circuit, component or device that reduces the signal strength without distorting the signal or reducing its fidelity.

Atto

The prefix representing the number 0.000,000,000,000,000,001

Attrition

The wearing down by rubbing or friction; abrasion.

ATV

An acronym for all-terrain vehicle.

Au

Gold An element with the atomic number of 79.

AUD

An acronym for Audio System Module (Chrysler).

Audio/Video Switcher

A component used in a multichannel entertainment system, or multimedia system, to allow different passengers to listen to different input sources.

Authorization

The process of granting or denying access to a network or resource.

Auto

Shortened form for automatic or automobile.

Auto Control

Another term used for automatic control.

Auto Ignition

Short for automatic ignition.

Auto-music Search

A feature on some head units that play cassette tapes. It advances or rewinds the tape to the next song. Sometimes, it also allows a listener to advance or rewind a specific number of songs.

Auto-Reverse

A feature on most head units that play cassette tapes. It automatically plays the other side of a tape when the end of the first side is reached. A button also allows the user to "change sides" without removing the tape from the head unit.

Autocross

A form of automotive competition that is held on a tight, closed course. Vehicle handling and agility is stressed, rather than flat out speed.

Automatic

Having the power of self-motion self-moving or self-acting.