1. 艾克斯：
AIX 是 IBM 提供的一系列专有操作系统。 AIX 代表高级交互式执行程序。最初，它是为 IBM RT PC RISC 工作站设计的，后来它用于各种硬件平台，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。它是通过 The Open Group 的 UNIX 03 标准认证的五个商业操作系统之一。 AIX 的第一个版本于 1986 年推出。AIX 的最新稳定版本是 7.2。
2. iOS :
iOS 是由 Apple Incorporation 提供的移动操作系统。它主要是为 iPhone 和 iPod Touch 等苹果移动设备设计的。它早先被称为 iPhone 操作系统。它是一个基于 Darwin(BSD) 操作系统的类 Unix 操作系统。它是仅次于 Android 的全球第二大移动操作系统。它主要用 C、C++、Objective-C、汇编语言和 Swift 编写。 iOS 的第一个版本于 2007 年推出。iOS 的最新稳定版本是 13.1。
AIX 和 iOS 的区别：
| AIX | iOS |
|---|---|
| It was developed and is owned by IBM. | It was developed and is owned by Apple Incorporation. |
| It was launched in 1986. | It was launched in 2007. |
| Its target system type is Server, NAS and workstation. | Its target system type are smartphone, music player and tablet computer. |
| Computer architectures supported are POWER, PowerPC-AS, PowerPC and Power ISA | Computer architectures supported are ARMv8-A (iOS 7-present), ARMv7-A (iPhone OS 3-iOS 10) and ARMv6 (iPhone OS 1-iOS 4.2.1). |
| Kernel type is Monolithic with modules. | Kernel type is Hybrid. |
| The native APIs are SysV/POSIX. | The native APIs are Cocoa and BSD-POSIX. |
| Preferred license is Proprietary. | Preferred license is Proprietary, APSL and GNU GPL. |
| Update management is Service Update Management Assistant (SUMA). | Update management is Software Update. |
| File systems supported are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. | File systems supported are HFS+ and APFS. |