ABF

ABG

ABH
anywhere but here

ABI

ABInormal? XD

ABJ
American-Born Japanese?

ABK

After-Burner Kick

ABL
Atmospheric boundary layer

ABM

Auto-Ballistic Missle

ABN

Alabama Board of Nursing or
Advance Beneficiary Notice

ABO
Actually Bashful Octopus

ABP

A Brilliant Professor

ABQ

That's the airport code for Albuquerque! :D

ABR

An abbreviation for abbreviation?

ABS

Antilock Brake System

ABT

Ants But Terrified

ABU

Abu is Aladdin's monkey friend in the disney movie! XD

ABV

ABW

ABX
Nope I messed that up.

ABZ

Another Baffled Zebra

ACA
with an I is a berry >.>

ACB

hee!

We missed ABY XD

ACC

American College of Cardiology

ACD

ACE!!

ACF
American Culinary Federation

ACG

ACH

Automated Clearinghouse

ACI

ACJ

ACK
.... ACK ACK ACK ACK ACK!

ACL

'ACK ACK ACK ACK ACK!'?? is this Mars Attacks?? XD

ACM
and yes XD

ACN

*woot* Mars Attacks! was a fun movie!

ACO

ACP

ACQ

ACR

ACS

ACT

ACT 1, Scene 2 :P