Versions POWER/PowerPC releases

AIX 7.1, September 10, 2010[3] 
AIX 6.1, November 9, 2007[2] 
AIX 5L 5.3, August 13, 2004[3] 
AIX 5L 5.2, October 18, 2002[4], end of support April 30, 2009[5] 
AIX 5L 5.1, May 4, 2001 (Support discontinued April 1, 2006)[7] 
AIX 4.3.3, September 17,1999 
AIX 4.3.2, October 23,1998 
AIX 4.3.1, April 24,1998 
AIX 4.3, October 31,1997 
AIX 4.2.1, April 25,1997 
AIX 4.2, May 17,1996 
AIX 4.1.5, November 8,1996 
AIX 4.1.4, October 20,1995 
AIX 4.1.3, July 7,1995 
AIX 4.1.1, October 28,1994 
AIX 4.1, August 12,1994 
AIX 4.0, 1994 
AIX 3.2 1992 
AIX 3.1, February 1990 
IBM PS/2 releases 
IBM 6150 RT releases


AIX V7 7.1, Sept 10, 2010[3] 

• AIX 5.2 Workload Partitions for AIX 7
• Support for export of fibre channel adapters to WPARs
• VIOS disk support in a WPAR
• Cluster Aware AIX

AIX 6.1, November 9, 2007[2] 

• Workload Partitions (WPARs) operating system-level virtualization
• Live Application Mobility
• Live Partition Mobility
• Security

1. Role Based Access Control RBAC
2. AIX Security Expert - A system and network security hardening tool
3. Encrypting JFS2 filesystem
4. Trusted AIX
5. Trusted Execution

• Integrated Electronic Service Agent(tm) for auto error reporting
• Concurrent Kernel Maintenance
• Kernel exploitation of POWER6 storage keys
• ProbeVue dynamic tracing
• Systems Director Console for AIX
• Integrated filesystem snapshot

AIX 5L 5.3, August 13, 2004[3] 

• NFS Version 4
• Advanced Accounting
• Virtual SCSI
• Virtual Ethernet
• Exploitation of Simultaneous multithreading (SMT)
• Micro-Partitioning enablement
• POWER5 exploitation
• JFS2 quotas
• Ability to shrink a JFS2 filesystem
• kernel scheduler has been enhanced to dynamically increase and decrease the use of virtual processors.

AIX 5L 5.2, October 18, 2002[4], end of support April 30, 2009[5] 

• Ability to run on the IBM BladeCenter JS20 with the PowerPC 970.
• Minimum level required for POWER5 hardware
• MPIO for Fibre Channel disks
• iSCSI Initiator software
• Participation in Dynamic LPAR
• Concurrrent I/O (CIO) feature introduced for JFS2 released in Maintenance Level 01 in May 2003[6]

AIX 5L 5.1, May 4, 2001 (Support discontinued April 1, 2006)[7] 

• Ability to run on an IA-64 architecture processor, although this never went beyond beta[8]
• Minimum level required for POWER4 hardware and the last release that worked on the Micro Channel architecture
• 64-bit kernel, installed but not activated by default
• JFS2
• Ability to run in a Logical Partition on POWER4
• The L stands for Linux affinity
• Trusted Computing Base (TCB)
• Support for mirroring with striping

AIX 4.3.3, September 17,1999 

• Online backup function
• Workload Manager (WLM)
• Introduction of topas utility

AIX 4.3.2, October 23,1998 AIX 4.3.1, April 24,1998 AIX 4.3, October 31,1997 

• Ability to run on 64-bit architecture CPUs
• IPv6
• Web-based System Manager

AIX 4.2.1, April 25,1997 

• NFS Version 3

AIX 4.2, May 17,1996 AIX 4.1.5, November 8,1996 AIX 4.1.4, October 20,1995 AIX 4.1.3, July 7,1995 

• CDE 1.0 became the default GUI environment, replacing Motif X Window Manager.

AIX 4.1.1, October 28,1994 AIX 4.1, August 12,1994 AIX 4.0, 1994 

• Run on RS/6000 systems with PowerPC processors and PCI busses.

AIX 3.2 1992 AIX 3.1, February 1990 

• Journaled File System (JFS) filesystem type

AIX 3.0 1989 

• LVM (Logical Volume Manager) was incorporated into OSF/1, and in 1995 for HP-UX[9], and the Linux LVM implementation is similar to the HP-UX LVM implementation.[10]
• SMIT was introduced.
• IBM PS/2 releases 

AIX PS/2 v1.1, 1989 

• last version was 1.3, 1992.
• IBM 6150 RT releases 

AIX v1.0, 1986 AIX v2.0 

• last version was 2.2.1.