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A Acronyms

Acronyms that start with Letter A





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Acronym Meaning / Link
1FB A standard type of telephone line
AA Author's alteration
AAD Analog Alignment Diskette
AANS Automatic ANSwer 
AAS Authentication and Authorization System (eGovernment)
ABC Atanasoff-Berry Computer
ABIOS Advanced Basic Input / Output System
ABR Available Bit Rate
AC Alternating Current
ACD Automatic Call Distributor or Distribution
ACF Advanced Communications Function
ACIS Automatic Customer/Caller Identification Service
ACK Acknowledgement
ACL Access Control List
ACPI Advanced Configuration and Power Interface
ACR Abandon Call and Retry or Advanced Communications Riser
ACS Automatic Class Selection
ACTA Administrative Council for Terminal Attachments
A-D Analog to digital
ADB Apple Desktop Bus (Macintosh bus for input, keyboards,mice, etc.)
ADC Analog Digital Converter
ADCCP Advanced Data Communications Control Procedures
ADN Additional Directory Number
ADPCM Adoptive Differential Pulse Code Modulation
ADSC Adobe Document Structuring Conventions
ADSI Active Directory Services Interface
ADSL Asymmetric Digital Subscriber Line
ADT Abstract Data Type or Application Development Trends (magazine)
AE Applications Engineer
AEC Alternate Exchange Carrier  (see CLEC) 
AERO As in .aero - Travel web site  (See our list of TLDs here)
AFC Automatic Frequency Control
AFM Adobe Font Metrics
AFP AppleTalk Filing Protocol (network file system from Apple)
AGC Automatic Gain Control
AGIS Apex Global Information Services
AGP Accelerated Graphics Port
AI Artificial Intelligence
AIC Analog Interface Circuit
AIN Advanced Intelligent Network
AIX Advanced Interactive Executive
AICP American Institute of Certified Planners, (Others)
AJAX Asynchronous Javascript And Xml
AKM Apogee Kick Motor
ALIVE Artificial Life Interactive Video Environment
ALU Arithmetic and Logical Unit
AM Amplitude Modulation or Access Mediation
AMD Advanced Micro Devices or "Air Movement Device" = IBM for a fan
AMI Alternative Mark Inversion
AMPS Advanced Mobile Phone System
AMR Audio Modem Riser
ANA Automatic Number Announcement
ANI Automatic Number Identification
ANSI American National Standards Institute
ANTD Advanced Network Technologies Division
APA All Points Addressable
APD Aldus Printer Description file
API Application Program Interface
APIC Advanced Programmable Interrupt Controller
APM Advanced Power Management
APPC Advanced Program-to-Program Communications
ARC Attached Resources Computing
ARLL Advanced Run Length Limited
ARP Address Resolution Protocol
ARQ Automatic Repeat Request
ARS Automatic Route Selection
ARTIC Analog Receive/Transmit Interface Circuit
AS Autonamous System
ASAP Any Service / Any Port
ASCII American Standard Code for Information Interchange
ASI Asynchronous Serial Interface in Digital Video Broadcasting (DVB)
ASIC Application Specific Integrated Circuit
ASN.1 Abstract Syntax Notation One


Active Server Pages, Application Service Provider


Advanced SCSI Programming Interface

ASP.NET Active Server Pages.NET MS program for application development
ASR Automatic Send / Receive
ASSP Anti-Spam Smtp Proxy server or Application-Specific Standard Product
AST Asynchronous System Trap
AT Advanced Technology, as in PC/AT; also ATtention (modem)
ATA AT bus Attachment
ATAPI AT Attachment Packet Interface
ATM Adobe Type Manager; also Asynchronous Transfer Mode
ATSC Advanced Television Systems Committee
ATX AT eXtended (motherboard architecture) 
AUI Attachment Unit Interface
AVI Audio / Video Interleaved
AVT Audio / Video Transport
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