Definition of AIX in The Network Encyclopedia.
What is AIX – UNIX
AIX is a version of the UNIX operating system developed by IBM for its RS/6000 platform of servers and workstations. The first version of AIX was based on the UNIX System V operating system (release 2).

The current major version is AIX Version 4.3. AIX is supported by symmetric multiprocessor (SMP) systems, scalable parallel systems, and workstations. These are some of the features of AIX 4.3:
- Concurrent support of 32-bit and 64-bit applications using 64-bit hardware
- A Web-based management system for managing AIX using any Java 1.1–enabled browser
- Binary compatibility with earlier version 4 .x releases
- C2 level security certification
- Fast Connect for high-speed PC file and print services
AIX IBM Latest Versions – AIX 7.2
Innovation for enterprise UNIX
- AIX Live Update allows non-disruptive kernel updates
- Built-In Dynamic System Optimizer for maximizing the efficiency of your system
- AIX integrated I/O caching for flash-optimized storage solutions
- SR-IOV-enhanced virtual networking with live partition mobility support for better performance and scaling
- Support for the Coherent Accelerator Processor Interface (CAPI)
- Latest version with a more frequent release schedule
- Continued binary compatibility with earlier releases of AIX