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. MINIX 3：
MINIX 3是一个免费的开源操作系统，由Andrew S. Tanenbaum开发。它是根据Berkeley软件发行许可证发行的。它是一个类似Unix的操作系统。它是专门为工作站设计的。它源自MINIX 1和MINIX 2操作系统。它基本上是使用C语言和汇编语言编写的。 MINIX 3的第一个版本于2005年发布。此操作系统中使用的内核是microkernel。
iOS和MINIX 3之间的区别：
| S.No. | IOS | MINIX 3 |
|---|---|---|
| 1. | It was developed by Apple Incorporation. | It was developed by Andrew S. Tanenbaum. |
| 2. | It was launched in 2007. | It was launched in 2005. |
| 3. | Its target system types are smartphone, music player and tablet computer. | Its target system types are workstations. |
| 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 MINIX 3 is IA-32. |
| 5. | Its kernel type is Hybrid. | Its kernel type is Microkernel. |
| 6. | Its native APIs are Cocoa and BSD-POSIX. | Its native APIs are POSIX. |
| 7. | It has the preferred license is Proprietary, APSL and GNU GPL. | It has the preferred license of BSD. |
| 8. | It has default GUI ‘on’. | It does not have default GUI ‘on’. |
| 9. | Its update management is Software Update. | It does not have update management. |