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. AmigaOS 4：
AmigaOS 4 是由 Hyperion Entertainment 提供的 Amiga 操作系统系列。它用于运行的 PowerPC 微处理器。它的设计主要基于 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 家族。 AmigaOS 4 的第一个版本于 2004 年推出。AmigaOS 4 的最新稳定版本是 4.1 Final Edition。它也被称为OS4或AOS4 。
Windows 和 AmigaOS 4 的区别：
| WINDOWS | AMIGAOS 4 |
|---|---|
| It was developed and is owned by Microsoft Incorporation. | It was developed and is owned by Hyperion Entertainment. |
| It was launched in 1985. | It was launched in 2004. |
| Current stable version is Windows 10. | Current stable version is 4.1 Final Edition. |
| It is for workstation, personal computers, media center, tablets and embedded systems. | Its target system type is workstation and personal computers. |
| Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | Computer architectures supported is PowerPC. |
| Kernel type is Hybrid with modules here. | Kernel type is Microkernel. |
| Package management is MSI or custom installer. | Package management is Installer. |
| The native APIs are Win32 and NT API. | The native APIs are Proprietary. |
| Preferred license is Proprietary and Source available. | Preferred license is Proprietary. |
| Update management is Windows Update. | Update management is AmiUpdate which is almost not needed. |
| File systems supported are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported are OFS, FFS, SFS, PFS, JXFS, FAT, ISO 9660, UDF and SMBFS. |