AAA: Automated Airline Assignment
AADC: Automated Area Distribution Center
AAFES: Army and Air Force Exchange Service
AAR: Advanced Address Recognizer
ABA: American Banking Association
ABC: Activity Based Costing
ABC: Advanced Bar Code
ABC: Audit Bureau of Circulations Inc.
ABC Group: Automation and Bar Code Group
ABE: Automated Barcode Evaluator
ABMPS: Automated Business Mail Processing System
AC: Actual Count
ACA: after contract award
ACA: Associate Contractor Agreement
ACDCS: Air Contract Data Collection System
ACE: Advanced Computing Environment
ACFS: Advanced Computerized Forwarding System
ACH: Automated Clearing House
ACL: Address Correction Letter
ACS: Address Change Service
ACSS: Air Contract Support System
ACT: Air Contract Transportation
ACT: Automation Compatible Tray
ADAPT: Automatic Density Analysis Profile Technique
ADC: Area Distribution Center
ADEPT: Acquisition for Desktop Extended Processing Equipment
ADJ: Adjustment
ADNE: Address Does Not Exist
ADP: Accountable Paper Depository
ADP: Automated Data Processing
ADSL: Asymmetric Digital Subscriber Line
ADVANCE: Advanced Mail Tracking & Reporting System for Standard Mail & Periodicals
AE: Additional Entry
AEC: Automated Element Correction
AECII: Automated Element Correction II
AEG: Allgemein Elektricitat Gesellschaft
AEP: Affirmative Employment Program
AES: Automated Enrollment System
AFA: After First Article
AFC: Advanced Facer-Canceller