Difference between AIX and OpenBSD

1. AIX :
AIX is a series of proprietary operating systems which is provided by IBM. AIX stands for Advanced Interactive eXecutive. Initially it was designed for the IBM RT PC RISC workstation and later it was used for various hardware platforms like IBM RS/6000 series, PowerPC-based systems, System-370 mainframes, PS-2 personal computers and Apple Network Server. It is one of the five commercial operating systems that have versions certified to UNIX 03 standard of The Open Group. The first version of AIX was launched in 1986. The latest stable version of AIX is 7.2.

2. OpenBSD :
OpenBSD is a security focused, free and open source operating system which is provided by The OpenBSD Project. It is based on the Berkeley Software Distribution. It is an Unix-like operating systems. It is available for many platforms including servers, NAS, workstations and embedded systems. It is basically written using C language, assembly language, Perl and Unix shell. The first version of OpenBSD was launched in 1995. The kernel used in this operating system is monolithic.

Difference between AIX and OpenBSD :

AIX	OpenBSD
It was developed and is owned by IBM.	It was developed and is owned by The OpenBSD Project.
It was launched in 1986.	It was launched in 1995.
Its target system type is Server, NAS and workstation.	Its target system types are server, NAS, workstation and embedded systems.
Computer architectures supported are POWER, PowerPC-AS, PowerPC and Power ISA.	Computer architectures supported by OpenBSD are IA-32, x86-64, SPARC, 68k, Alpha and VAX.
Kernel type is Monolithic with modules.	Its kernel type is Monolithic.
The native APIs are SysV/POSIX.	Its native APIs are BSD-POSIX.
Preferred license is Proprietary.	It has the preferred license of ISC.
Update management is Service Update Management Assistant (SUMA).	Its update management is by source or by binary.
File systems supported are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS.	File systems supported by OpenBSD are ffs, ext2, FAT, ISO 9660 and NFS.
The non-native APIs supported through its subsystems are DOS API, Win16, POSIX and .NET.	The non-native APIs are not supported through its subsystems.