Android
- A modified version of the Linux kernel and other open-source software, designed primarily for touchscreen-based mobile devices such as smartphones and tablet computers.
CentOS
- A discontinued Linux distribution that provided a free and open-source community-supported computing platform, functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL).
ChromeOS
- An operating system designed and developed by Google.
Debian
- One of the oldest operating systems based on the Linux kernel, and is the basis of many other Linux distributions.
FreeBSD
- A free-software Unix-like operating system descended from the Berkeley Software Distribution (BSD).
HarmonyOS
- A distributed operating system developed by Huawei for smartphones, tablets, smart TVs, smart watches, personal computers and other smart devices.
iOS
- A mobile operating system created and developed by Apple for its iPhone line of smartphones.
iPadOS
- A mobile operating system developed by Apple for its iPad line of tablet computers.
Linux
- A family of open source Unix-like operating systems based on the Linux kernel first released on September 17, 1991, by Linus Torvalds.
macOS
- A proprietary Unix-like operating system, derived from OPENSTEP for Mach and FreeBSD, which has been marketed and developed by Apple Inc. since 2001.
MS-DOS
- An operating system for x86-based personal computers mostly developed by Microsoft.
OpenBSD
- A security-focused, free software, Unix-like operating system based on the Berkeley Software Distribution (BSD).
openSUSE
[SUSE]
- A free and open-source Linux distribution developed by the openSUSE Project.
RHEL
- A commercial Linux distribution developed by Red Hat.
Ubuntu
- A Linux distribution based on Debian and composed primarily of free and open-source software.
Unix
- A family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, whose development started in 1969[1] at the Bell Labs.
Windows
- A product line of proprietary graphical operating systems developed and marketed by Microsoft.