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.蜻蜓BSD：
DragonFly BSD 是由 Matthew Dillon 开发的免费开源操作系统。它是一个类 Unix 操作系统，其设计灵感来自 FreeBSD 操作系统。基本不用于个人电脑。它专为服务器、工作站、NAS 和嵌入式系统而设计。主要使用的编程语言是C语言。 DragonFly BSD 的第一个版本于 2003 年推出。 DragonFly BSD 的最新稳定版本是 5.6.1。它具有混合内核。
Windows 和 DragonFly BSD 的区别：
| WINDOWS | DRAGONFLY BSD |
|---|---|
| It was developed by Microsoft Incorporation. | It was developed by Matthew Dillon. |
| It was launched in 1985. | It was launched in 2003. |
| It is for workstation, personal computers, media center, tablets and embedded systems. | Its target system type is workstation, server, NAS and embedded systems. |
| Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | Computer architectures supported is x86-64. |
| Kernel type is Hybrid with modules here. | Kernel type is Hybrid. |
| Package management is MSI or custom installer. | Package management is dports or pkg. |
| The native APIs are Win32 and NT API. | The native APIs are BSD/POSIX. |
| Preferred license is Proprietary and Source available. | Preferred license is BSD. |
| Update management is Windows Update. | Update management are git, cvsup, rsync and pkg. |
| File systems supported are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported are UFS1, MFS, ext2, FAT, HAMMER and ISO 9660. |