1. AIX：
AIX是IBM提供的一系列专有操作系统。 AIX代表Advanced Interactive eXecutive。最初，它是为IBM RT PC RISC工作站设计的，后来又用于各种硬件平台，例如IBM RS / 6000系列，基于PowerPC的系统，System-370大型机，PS-2个人计算机和Apple Network Server。它是五个具有The Open Group的UNIX 03标准认证的商业操作系统之一。 AIX的第一个版本于1986年发布。AIX的最新稳定版本是7.2。
2. NetBSD：
NetBSD是由NetBSD Foundation提供的免费开放源代码操作系统。它基于Berkeley软件发行版。它是一个类似Unix的操作系统。它可用于许多平台，包括服务器，台式机，手持设备和嵌入式系统。 NetBSD项目着重于精心设计，在许多计算机体系结构中的代码清晰度和可移植性。 NetBSD的源代码是公开可用的，并已获得许可。 NetBSD的第一个版本于1993年发布，其内核类型是单片的。
AIX和NetBSD之间的区别：
| AIX | NetBSD |
|---|---|
| It was developed and is owned by IBM. | It was developed and is owned by The NetBSD Foundation. |
| It was launched in 1986. | It was launched in 1993. |
| Its target system type is Server, NAS and workstation. | Its target system types are NAS, server, workstation and embedded systems. |
| Computer architectures supported are POWER, PowerPC-AS, PowerPC and Power ISA. | Computer architectures supported by NetBSD are IA-32, x86-64, ARM, MIPS, PowerPC and sparc64. |
| Kernel type is Monolithic with modules. | Its kernel type is Monolithic with modules. |
| The native APIs are SysV/POSIX. | Its native APIs are BSD-POSIX. |
| Preferred license is Proprietary. | It has the preferred license of BSD. |
| File systems supported are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. | File systems supported by NetBSD are UFS, UFS2, ext2, FAT, ISO 9660, NFS and LFS. |
| The non-native APIs supported through its subsystems are DOS API, Win16, POSIX and .NET. | The non-native APIs supported through its subsystems are Linux and others. |
| Update management is Service Update Management Assistant (SUMA). | Its update management is by source or by binary. |