Linux and BSD are both excellent and available free of charge.
No.
Ubuntu Linux.
An online auction software that is available for all operating systems is "HammerSnipe". HammerSnipe is available for all operating systems because there is nothing to download.
One of the best free operating systems is Linux. It does pretty much everything Windows can do, but there is no cost to own and operate it.
Verizon wireless smartphones have a few different operating systems available. Operating systems include Android, Windows Phone, Google and Blackberry.
Yes, Hold'em Manager is available for use on Mac operating systems.
Yes. Ubuntu Server, Fedora, and CentOS are popular free operating systems for servers.
Spreadsheet packages are available for various operating systems, such as Windows, Macintosh, UNIX, Java, Linux, and VMS.
You can download free vmware images of operating systems if you search on google. For example there are two good free operating systems, first you can download ubuntu from linux or chrome os.
Many operating systems are available with no purchase price. A few will even mail you installation media for free. As such, there can be no "cheapest" in terms of sheer unit / license price. Manpower can be hard to judge the value of, though many free operating systems consumed lots of manpower to create.
"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. The choice of non-proprietary operating systems can make it much easier to upgrade hardware as new technology becomes available.
"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.