| TLA | Definition | Class |
| AAA |
American Automobile Association
Service organization for car owners, sells annual memberships, provides emergency services like towing, jump starts, opening lockouts, etc.
| Automotive and Transportation |
| ABC |
American Broadcast Company
one of the four major non-cable tv networks (see NBC and CBS)
...Contributed by mrockwellr@cs.com
| Science and Technology |
| ABE |
Adult Basic Education
Classes for adult students which are not high school level (covers a range of skill levels from literacy to 8th grade)
...Contributed by a user
| Education |
| ABL |
Airborne Laser
a weapons system designed for use by the United States military
...Contributed by Jondo
| Military |
| ABL |
American Beverage Licensees
An association representing off-premise licensees in the "open" or "license" states and on-premise proprietors in markets across the nation.
...Contributed by Jondo
| Society |
| ABL |
Atmospheric Boundary Layer
The region where the atmosphere interacts with the surface of the earth
...Contributed by Jondo
| Science and Technology |
| ABL |
Automatic Brightness Limiter
protection circuitry in CRT monitors
| Science and Technology |
| ABS |
Acrylonitrile Butadiene Styrene
Type of plastic often used in piping for high pressure air and for DWV systems.
...Contributed by Larry Perkins
| Industry and Manufacturing |
| ABS |
Antilock Braking System
A safety system which prevents the wheels on a motor vehicle from locking while braking.
...Contributed by Lynn Chin
| Automotive and Transportation |
| ABS |
Automatic Block Signal
Name of signals used on railroads
...Contributed by trainman
| Automotive and Transportation |
|