APET - Anticipated Pure Execution Time

APFR - Annalist of Presence and Future Requirements

API - Application Programmer Interface

API - Application Program Interface

APIC - Advanced Programmable Interrupt Controller

APIS - Advanced Passenger Information System

APL - A Programming Language

APM - Advanced Power Management

APN - Abstract Petri Net

APNIC - Asia-Pacific Network Information Center

APOP - Authenticated Post Office Protocol

APP - Application

APPC - Advanced Program - to - Program Communication

APPI - Advanced Peer - to - Peer Internetworking

APPN - Advanced Peer to Peer Networking

APR - Address Resolution Protocol

APRP - Adaptive Pattern Recognition Processing

APS - Advanced Printing Service

APS - Asynchronous Protocol Specification

APS - Automatic Protection Switching

APSE - ADA Programming Support Environment

APT - Address Pass Through

APT - Advanced Parallel Technology

APT - Automatically Programmed tools

ARA - Appletalk Remote Access