1. Chrome 操作系统：
Chrome OS 是 Google 提供的基于 Linux 内核的操作系统。它使用 Google Chrome 网络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。 Chrome OS 的第一个版本于 2009 年由谷歌推出。谷歌宣布它是一种用户数据和应用程序都驻留在云中的操作系统。 Chrome OS 的最新稳定版本是 75.0.3770.102。
2. FreeBSD：
FreeBSD 是 FreeBSD 项目提供的免费开源操作系统。它是在两个类 Unix 操作系统 Berkeley Software Distribution (BSD) 和 Research Unix 的基础上设计的。它与 Linux 操作系统非常相似。它是早期著名的操作系统之一，但与其他操作系统相比，现在使用较少。 FreeBSD 的第一个版本于 1993 年推出。FreeBSD 的最新稳定版本是 12.1。
Chrome OS 和 FreeBSD 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. |