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. GhostBSD :
GhostBSD 是由 Eric Turgeon 和 GhostBSD 团队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 TrueOS 操作系统。它有一个名为 MATE 的默认桌面环境。它专门用于台式机和工作站。早些时候，它使用了一个名为 GNOME 的默认桌面环境。 GhostBSD 的第一个版本于 2009 年推出。 GhostBSD 的最新稳定版本是 19.10。它具有带有模块的单片内核。
Windows 和 GhostBSD 的区别：
| WINDOWS | GHOSTBSD |
|---|---|
| It was developed by Microsoft Incorporation. | It was developed by Eric Turgeon. |
| It was launched in 1985. | It was launched in 2009. |
| It is for workstation, personal computers, media center, tablets and embedded systems. | Its target system type is workstation and desktop. |
| Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | Computer architectures supported are IA-32 and x86-64. |
| Kernel type is Hybrid with modules. | Kernel type is Monolithic with modules. |
| Package management is MSI or custom installer. | Package management is Ports collection. |
| Update management is Windows Update. | Update management is by source or network binary update. |
| 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. |
| File systems supported are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported are UFS2, ext2, ext3, FAT, ISO 9660, UDF, NFS, ReiserFS, XFS and ZFS. |