Yes. Windows 7 is a system distribution in the Windows family built around Microsoft's proprietary NT operating system.
Ubuntu is also one of many Linux distributions built around the open source Linux operating system.
Ubuntu is a "distro" of the Linux operating system.
Yes, Ubuntu is an operating system, that uses the Linux Kernel.
Ubuntu - operating system - was created on 2004-10-20.
Open source, such as one of the Linux variants; Ubuntu, or Kubuntu, for example.
Ubuntu is free, it can not be pirated.
By system software, do you mean the Operating System; Window 7 being one example? I use Ubuntu on most of my computers.
You can use the Ubuntu operating system as you would use any other operating system! Unlike MS Windows, which is propriety and has to be paid for, Ubuntu is a free, open-source operating system that can be downloaded for free, and copied and given away as much as you like! I recommend searching Google for more info.
Windows 10 is currently a free operating system and can be downloaded on the Microsoft website, Ubuntu OS is also a free operating system, it can be Downloaded from the Ubuntu website Ubuntu.com/download
Ubuntu Server Edition is a free and open-source operating system for use in servers.
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Ubuntu is an operating system, so just tell the installer to use the entire disk. However, an operating system is useless without software, and Ubuntu includes many software packages on a clean install.