1. iOS：
iOS是苹果公司提供的移动操作系统。它主要是为iPhone和iPod Touch等Apple移动设备设计的。它以前被称为iPhone OS。它是基于Darwin(BSD)操作系统的类Unix操作系统。它是仅次于Android的世界第二使用最多的移动操作系统。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年发布。
2. AmigaOS 4：
AmigaOS 4是Hyperion Entertainment提供的一系列Amiga操作系统。它用于运行PowerPC微处理器。其设计主要基于Commodore的AmigaOS 3.1。它部分基于德国公司Haage and Partner的AmigaOS 3.9。它主要是用C语言编写的。它属于AmigaOS系列。 AmigaOS 4的第一个版本于2004年发布。AmigaOS4的最新稳定版本是4.1 Final Edition。也称为OS4或AOS4。
iOS和AmigaOS 4之间的区别：
| S.No. | IOS | AMIGAOS 4 |
|---|---|---|
| 1. | It was developed by Apple Incorporation. | It was developed by Hyperion Entertainment. |
| 2. | It was launched in 2007. | It was launched in 2004. |
| 3. | Its target system types are smartphone, music player and tablet computer. | Its target system types are workstation and personal computers. |
| 4. | Computer architectures supported by iOS are ARMv8-A (iOS 7-present), ARMv7-A (iPhone OS 3-iOS 10) and ARMv6 (iPhone OS 1-iOS 4.2.1). | Computer architectures supported by AmigaOS 4 is PowerPC. |
| 5. | Its kernel type is Hybrid. | Its kernel type is Microkernel. |
| 6. | Its native APIs are Cocoa and BSD-POSIX. | Its native APIs are Proprietary. |
| 7. | It has the preferred license is Proprietary, APSL and GNU GPL. | It has the preferred license of Proprietary. |
| 8. | Its update management is Software Update. | Its update management is AmiUpdate which is almost not needed. |
| 9. | The non-native APIs are not supported through its subsystems. | The non-native APIs supported by its subsystems are BSD subsets. |
| 10. | File systems supported by iOS are HFS+ and APFS. | File systems supported by AmigaOS 4 are OFS, FFS, SFS, PFS, JXFS, FAT, ISO 9660, UDF and SMBFS. |