190 A Ampere A&SG Accessories and Supplies Group A/D Analog/Digital AAA Aces of Ansi Art AAB Amazing Astrofest Bunch AARNET Australian Academic Research Network AAX Automated Attendant Exchange AB2 Anarchy Burger ][ ABA American Bankers Association ABA American Bar Association ABATS Automated Bit Access Test System ABBS Apple Bulletin Board System ABHC Average Busy Hour Calls ABS Alternative Billing Service ABSBH Average Busy Season Busy Hour ABU Application Business Unit AC Alternating Current ACARB Australian Computer Abuse Research Bureau ACB Annoyance Call Bureau ACB Automatic Call-Back ACCOLC Access Overload Class ACCS Automated Calling Card Service ACD Automatic Call Distributor ACE Arcane Corporate Elite ACE American Council on Education ACE Ansi Creation Enterprise ACK Acknowledge ACM Association for Computing Machinery ACMS Application Control Management System ACN Area Code Number ACS Application Control Services ACS Australian Computer Society ACS Automatic Clearing Houses ACT Application Center for Technology ACTS Automated Coin Toll Service ACU Automatic Call Unit ACID ANSI Creators In Demand AD Altered Destiny AD Authorized Dealers ADAPSO Association of Data Processing Services Organizations ADAS Advanced Directory Assistance System ADCCP Advanced Data Communications Control Procedure ADCI Automatic Display Call Indicator ADD Authorized Digital Dealers ADG Authorized Distributor Group ADM Add-Drop MultiPlex ADN Abbreviated Dialing Number ADS Advanced Digital System ADS Audio Distribution System ADS Auxiliary Data System ADTS Automated Digital Terminal System ADU Application Definition Utility AE Ascii Express AEA American Electronics Association AFACTS Automated FACilities Test System AFADS Automatic Force Adjustment Data System AFC Ansi Factory AFSK Automatic Frequency Shift Keying AG/EEE Above Ground Electronic Equipment Enclosures AHP AcidHell Productions AI Artificial Intelligence AIA Aerospace Industries Association AIA Application Integration Architecture AIC Automatic Intercept Center AICC Automatic Intercept Communications Controller AICPA American Institute of Certified Public Accountants AIDS Apple Infected Disk Syndrome AIOD Automatic Identification of Outward Dialing AIS Alarm Indication Signals AIS Automatic Intercept System AITRC Applied Information Technologies Research Center ALBO Automatic Line Build Out ALC Automatic Level Control ALF Anti Lamers Foundation ALFE Analog Line Front End ALGOL ALGOrhythmic Computer Language ALI Automatic Location Identification ALIT Automatic Line Insulation Testing ALRU Automatic Line Record Update ALS Automated List Service ALU Arithmetic Logic Unit AM Administrative Module AM Amplitude Modulation AMA Automatic Message Accounting AMACS Automatic Message Accounting Collection System AMARC Automatic Message Accounting Recording Center AMASE Automatic Message Accounting Standard Entry AMAT Automatic Message Accounting Transmitter AMATPS Automatic Message Accounting Transmitter Teleprocessing System AMC Area Management Center AMD Advanced Micro Devices AMERITECH American Information Technologies AMI American Microsystems Incorporated AMIGA A-Mere-Idiotic-Gaming-Apparatus AMIS Atari Message and Information System AMM Area Manufacturing Manager AMP Ampere AMPS Advanced Mobile Phone Service AMR Automatic Meter Reading AMWI Active Message Waiting Indicator AN Aryan Nations AN Associated Number ANA Automatic Number Announcement ANC All Number Calling ANE Anarchy 'N' Explosives ANI Automatic Number Identification ANIF Automatic Number Identification Failure ANL Argonne National Laboratory ANN Announcement Date ANOI A New Order of Intelligence ANSI American National Standards Institute ANX Anoxia AOA Anarchists of America AOD Academy of Deception AOJ Add one and do not Jump AOM Area Operations Manager AOS Add One and do not Skip AOSS Auxiliary Operator Service System AOT Art of Technology AOV Average Order Value AP Attached Processor APC AMARC Protocol Converter APF All PIN's Fail APHA American Phreak/Hack Association API American Pirate Industries APL A Programming Language APP Application APPC Advanced Peer to Peer Communication APPC Advanced Program to Program Communication APPIX Automated Part and Product Information Exchange APS Automatic Protection Switch APSS Automatic Protection Switching System APT Advanced Pirate Technology APT American Phone Terrorists AQS Automatic Quote System AR Alarm Report ARB Application Review Board ARC Ames Research Center ARC Audio Response Controller ARCV Association of Really Cruel Viruses ARIS Audichron Recorded Information System ARM Area Revenue Manager ARP Address Resolution Protocol ARPA Advanced Research Projects Agency ARQ Automatic Repeat Request ARRL American Radio Relay League ARS Alternate Route Selection ARS Automatic Route Selection ARSB Automated Repair Service Bureau ARU Audio Response Unit AS Anarchy Society ASB Astrofence Bunch ASC Average System Cost or Average System Content ASCII American Standard Code for Information Interchange ASD Advanced Semiconductor Development ASIS American Society for Industrial Security ASMP Asymmetrical Multi-Processing ASOC Administrative Service Oversight Center ASPEN Automatic System for Performance Evaluation of the Network ASR Access Service Request ASV Average System Value AT Access Tandem AT Advanced Technology AT&T American Telephone and Telegraph Company ATB All Trunks Busy ATC Automatic Transmission Control ATD Authorized Terminal Distributor ATH Abbreviated Trouble History ATI Activist's Times Incorporated ATI Automatic Test Inhibit ATIS Automatic Transmitter Identification System ATM Automatic Teller Machine ATMS Automated Trunk Measurement System ATP All Tests Pass ATP Available to Promise ATR Alternate Trunk Routing ATRS Automated Trouble Reporting System ATSE Application Timesharing Software Engineering ATTC Automatic Transmission Test and Control Circuit ATTIS AT&T Information System AUDIX Audio Information Exchange AUTODIN Automatic Digital Network AUTOVON Automatic Voice network AUXF Auxiliary Frame AVD Alternate Voice Data AVG Avengers AVLHL Always Very Lubricated Happy Lemmins AVT Architecture Verification Test AWA Anti-Warez Association AWOL Artists WithOut Loyalty