User-code stack is not reliable for kernel-code, just one thing for example: it can be too small.
two level implementation
The hard drive has to be partitioned into at least two drives. Each can be loaded with a separate bootable operating system.
ljkhlh
It in UNIX the GUI is separate from the operating system itself. You can uninstall the GUI and still have a completely working UNIX system.
Yes you can. You would need to create separate partitions for each operating system - installing each operating system into its own partition. When you switch on the computer, it will show a menu allowing you to choose which operating system you want to start.
For best results: two separate hard drives, if not, two separate partitions. Two separate operating systems and a bootloader capable of loading multiple operating systems are requirements.
It depends on the licensing agreement that the software company offers. The Microsoft answer would be generally NO. Many other operating systems are distributed under different agreements and may allow usage on several computers.
The Apple iPhone is a separate computer from any other computer line. It runs its own operating system, which is completely separate from Apple's OSX desktop/laptop operating system.
two level implementation
white abolitionists generally favored the formation of separate black antislavery organizations
The hard drive has to be partitioned into at least two drives. Each can be loaded with a separate bootable operating system.
ljkhlh
Unless you're operating your small business as a sole proprietorship or general partnership, you need to demonstrate that the business is separate from the owners.
Generally no, but there are probably a minority of them that do.
It in UNIX the GUI is separate from the operating system itself. You can uninstall the GUI and still have a completely working UNIX system.
To install two separate operating systems you will have to create separate partions on the hard disk. You then install each operating system in it's own partion and use a boot loader such as GRUB to select which system you want to boot, some operating systems might include their own boot loader during the installation.
Yes you can. You would need to create separate partitions for each operating system - installing each operating system into its own partition. When you switch on the computer, it will show a menu allowing you to choose which operating system you want to start.