1. AIX：
它是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. DragonFly BSD：
它是由Matthew Dillon开发的免费开源操作系统。它是一个类似Unix的操作系统，其设计灵感来自FreeBSD操作系统。它基本上不用于个人计算机。它是专门为服务器，工作站，NAS和嵌入式系统设计的。主要使用的编程语言是C语言。 DragonFly BSD的第一个版本于2003年发布。DragonFlyBSD的最新稳定版本是5.6.1。它具有混合内核。
AIX和DragonFly BSD之间的区别：
| AIX | DragonFly BSD |
|---|---|
| It was developed and is owned by IBM. | It was developed by Matthew Dillon. |
| It was launched in 1986. | It was launched in 2003. |
| Its target system type is Server, NAS and workstation. | Its target system type is workstation, server, NAS and embedded systems. |
| Computer architectures supported are POWER, PowerPC-AS, PowerPC and Power ISA. | Computer architectures supported is x86-64. |
| Kernel type is Monolithic with modules. | Kernel type is Hybrid. |
| Package management is installp and RPM. | Package management is dports or pkg. |
| The native APIs are SysV/POSIX. | The native APIs are BSD/POSIX. |
| Preferred license is Proprietary. | Preferred license is BSD. |
| Update management is Service Update Management Assistant (SUMA). | Update management are git, cvsup, rsync and pkg. |
| File systems supported are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. | File systems supported are UFS1, MFS, ext2, FAT, HAMMER and ISO 9660. |