1. 视窗：
Windows 是一组由 Microsoft Incorporation 提供的各种专有图形操作系统。它也被称为Microsoft Windows 。它目前包括 Windows NT 和 Windows IoT 作为其家族成员。早些时候，它包括不再使用的 Windows 9x、Windows Mobile 和 Windows Phone。它是个人计算机中最常用的操作系统。 Windows 的第一个版本由 Microsoft 于 1985 年推出。用于个人计算机的 Windows 的最新版本是 Windows 10。
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。
Windows 和 iOS 的区别：
| WINDOWS | IOS |
|---|---|
| It was developed and is owned by Microsoft Incorporation. | It was developed and is owned by Apple Incorporation. |
| It was launched in 1985. | It was launched in 2007. |
| Current stable version is Windows 10. | Current stable version is 13.1. |
| It is for workstation, personal computers, media center, tablets and embedded systems. | Its target system type are smartphone, music player and tablet computer. |
| Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | 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 Hybrid with modules. | Kernel type is Hybrid. |
| The native APIs are Win32 and NT API. | The native APIs are Cocoa and BSD-POSIX. |
| Preferred license is Proprietary and Source available. | Preferred license is Proprietary, APSL and GNU GPL. |
| Update management is Windows Update. | Update management is Software Update. |
| It charges for original version. | It is free of cost. |
| File systems supported are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported are HFS+ and APFS. |