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. HP – UX：
HP-UX是HP Enterprise提供的封闭源操作系统。它是一种类似Unix的操作系统，其设计基于Unix SystemV。它基本上是为HP计算机设计的。它的目标系统是服务器。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。 HP-UX的第一个版本于1983年发布。HP-UX的最新稳定版本是11i-v3。它具有带有可动态加载模块的Monolithic内核。
AIX和HP-UX之间的区别：
| AIX | HP-UX |
|---|---|
| It was developed and is owned by IBM. | It was developed and is owned by HP Enterprise. |
| It was launched in 1986. | It was launched in 1983. |
| Its target system type is Server, NAS and workstation. | Its target system type is server. |
| Computer architectures supported are POWER, PowerPC-AS, PowerPC and Power ISA. | Computer architectures supported are PA-RISC and IA-64. |
| Kernel type is Monolithic with modules. | Kernel type is Monolithic with dynamically loadable modules. |
| Package management is installp and RPM. | Package management is SD or swinstall. |
| Update management is Service Update Management Assistant (SUMA). | Update management is SWA (HP-UX Software Assistant)). |
| The native APIs are SysV/POSIX. | The native APIs are SysV/POSIX. |
| Preferred license is Proprietary. | Preferred license is Proprietary. |
| File systems supported are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. | File systems supported are VxFS, HFS, CDFS, EVFS, NFS and CIFS. |