All operating systems have to use binary code in order to operate. The difference between open-source operating systems and Windows is that you can see the code before it is converted into a binary format.
Almost all Unix systems are proprietary; they are not open source, and you usually only get the binary modules, not the source code.
Windows, Macintosh
Not if you have to pay for the OS
Microsoft makes the most popular operating systems, eg:Windows XPWindows VistaWindows 7They are propriety operating systems (made by a company and sold). You can also get open source operating systems which are free, eg:Linux Ubuntu
There are several open-source operating systems, most of which appear to be clones of Unix. Examples include FreeBSD, Linux, Minix.
Unix and any Unix based operating systems can be downloaded for free. There are also many operating systems that can run on top of Windows or side by side. Many of these types of operating systems are Lynix based. All of these operating systems are "open source" which means that any one that knows how to, they can modify, rewrite, or add new features to the programs. Being open source software is that makes it free to download.
Linux and FreeBSD are 2 examples
There is no criteria for judging when an operating system is complete, so many are in a state of development. many new open-source hobby operating systems are created every day.
Operating System Zoo is a website that hosts disk images of free an open-source operating systems for use in virtual machines and emulators.
There are many open-source operating systems. They include:AROSContikiDarwin (the core of Mac OS X)ECosFreeBSDFreeDOSGeckOSGNU HURDHaikuJNodeJXKolibriOSLUnix (not to be confused with Linux)MonaNetBSDOberonOpenBSDPlan 9ReactOSSyllableSystems based on the Linux kernel (Ubuntu, Debian, RHEL, Fedora)Systems based on the OpenSolaris kernel, including Nexenta and Belenix
"Proprietary" means that the source is closed or only available to a select few. Microsoft Windows is an excellent example of a proprietary operating system. "Non-proprietary" is the opposite of the above. These are more commonly referred to as "free" operating systems, since you have access to the underlying code, and can modify it. Linux and FreeBSD are excellent examples of non-proprietary operating systems.
Proprietary operating systems are commercial operating systems designed to run on specific computer hardware for which they are licensed. Other operating systems such as Linux and OpenBSD are free and open source and can be used on any hardware on which someone can make it work. The Android operating system is a Google implementation of Linux designed to work on smart phones and tablets.