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. QNX：
QNX是Blackberry Limited提供的商业实时操作系统。它是一个类似Unix的操作系统。此操作系统中使用的内核是微内核。它是第一个商业上成功的微内核操作系统之一。它最初是由昆腾软件系统公司开发的，后来被更名为QNX软件系统公司。 QNX Sofftware Systems在2010年被BlackBerry Limited收购。QNX的第一个版本于1982年推出。
AIX和QNX之间的区别：
| AIX | QNX |
|---|---|
| It was developed by IBM. | It was developed by QNX Software Systems. |
| It was launched in 1986. | It was launched in 1982. |
| Its target system type is Server, NAS and workstation. | Its target system types are automotive, medical, smartphones, consumer, industrial, embedded systems and safety. |
| It is owned by IBM. | It is owned by Blackberry Limited. |
| Computer architectures supported are POWER, PowerPC-AS, PowerPC and Power ISA. | Computer architectures supported by QNX are x86, SH-4, PowerPC, ARM and MIPS. |
| Kernel type is Monolithic with modules. | Its kernel type is Microkernel. |
| The native APIs are SysV/POSIX. | Its native APIs are POSIX and Java. |
| Preferred license is Proprietary. | It has the preferred license of Proprietary. |
| The non-native APIs supported through its subsystems are Mono, Java, Win16 and Win32. | The non-native APIs are not supported through its subsystems. |
| File systems supported are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. | File systems supported by QNX are QNX4FS, QNX6, ext2, FAT, ISO 9660, Joliet, NFS, CIFS, ETFS, UDF, HFS, HFS+ and NTFS. |