1. Chrome操作系统：
Chrome操作系统是Google提供的基于Linux内核的操作系统。它使用Google Chrome浏览器作为主要用户界面。它是使用C，C++，Javascript，HTML5， Python和Rust开发的。它用于称为Chromebook的个人计算机中。谷歌于2009年发布了第一版Chrome OS。谷歌宣布将其作为一种操作系统，其中用户数据和应用程序都驻留在云中。 Chrome操作系统的最新稳定版本是75.0.3770.102。
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。
Chrome OS和FreeBSD之间的区别：
| FreeBSD | Chrome OS |
|---|---|
| It was developed and is owned by The FreeBSD Project. | It was developed and is owned by Google LLC. |
| It was launched in 1993. | It was launched in 2009. |
| It is not designed for personal computers. | It is specifically designed for Chromebook. |
| Current stable version is 12.1. | Current stable version is 75.0.3770.102. |
| Its target system type is server, workstation, NAS and embedded systems. | Its target system type is Chromebook, Chromebox, Chromebase and tablets. |
| Computer architectures supported are IA-32, x86-64, ARM, MIPS and PowerPC. | Computer architectures supported are ARM, IA-32 and x86-64. |
| Kernel type is Monolithic with modules. | Kernel type is Monolithic with modules. |
| The native APIs are BSD/POSIX. | The native APIs are Linux/POSIX. |
| File systems supported are UFS2, ZFS, ext2, ext3, FAT, ISO 9660, UDF and NFS. | File systems supported are eCryptfs, NTFS, FAT, FAT16, FAT32, exFAT, ext2, ext3, ext4, HFS+, MTP, ISO 9660 and UDF. |