1. Windows：
Windows是Microsoft Incorporation提供的一组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作为其家族的成员。早期包括不再使用的Windows 9x，Windows Mobile和Windows Phone。它是个人计算机中使用最多的操作系统。 Microsoft于1985年发布了Windows的第一个版本。用于个人计算机的Windows的最新版本是Windows 10。
2. FreeBSD：
FreeBSD是FreeBSD项目提供的一个免费的开源操作系统。它是基于两个类似Unix的操作系统Berkeley Software Distribution(BSD)和Research Unix设计的。它与Linux操作系统非常相似。它是较早的著名操作系统之一，但是现在与其他操作系统相比，它的使用率有所降低。 FreeBSD的第一个版本于1993年发布。FreeBSD的最新稳定版本是12.1。
Windows和FreeBSD之间的区别：
| WINDOWS | FREEBSD |
|---|---|
| It was developed and is owned by Microsoft Incorporation. | It was developed and is owned by The FreeBSD Project. |
| It was launched in 1985. | It was launched in 1993. |
| It is designed for PC of all companies. | It is not designed for personal computers. |
| Current stable version is Windows 10. | Current stable version is 12.1. |
| It is for workstation, personal computers, media center, tablets and embedded systems. | Its target system type is server, workstation, NAS and embedded systems. |
| Computer architectures supported by Windows are IA-32, x86-64, IA-64, ARM, Alpha, MIPS and PowerPC. | Computer architectures supported are IA-32, x86-64, ARM, MIPS and PowerPC. |
| Kernel type is Hybrid with modules here. | Kernel type is Monolithic with modules. |
| Package management is MSI or custom installer. | Package management is Port collections and packages. |
| The native APIs are Win32 and NT API. | The native APIs are BSD/POSIX. |
| File systems supported are NTFS, FAT, ISO 9660, UDF, HFS+, FATX and HFS. | File systems supported are UFS2, ZFS, ext2, ext3, FAT, ISO 9660, UDF and NFS. |
| Preferred license is Proprietary and Source available. | Preferred license is BSD. |