1.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。
2. 迷你 3 ：
MINIX 3 是由 Andrew S. Tanenbaum 开发的免费开源操作系统。它是在 Berkeley Software Distribution 许可下发布的。它是一个类Unix操作系统。它是专为工作站设计的。它源自 MINIX 1 和 MINIX 2 操作系统。它基本上是用C语言和汇编语言编写的。 MINIX 3 的第一个版本于 2005 年推出，该操作系统使用的内核是微内核。
iOS 和 MINIX 3 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. |