After it's installed about 11 or 12 gigs, but you will need at least another 10-15% extra just for the OS to use in the background, just like Windows needs the same. Not to mention expansion room for other software added later.
The Lion installer will fit on an 8gig flash drive.
The space reserved for virtual memory varies on different computers. It depends on the operating system in use and how much system memory is available.
It depends, which operating system you are going to install, usually windows occupies more space than that of Linux operating systems. Windows can utilize upto 5GB space for all the installation files, whereas Linux eats much low space.
It will depend upon how much data and programs you have on your system. A Windows 7 installation without any programs on it can be backed up in about 6 Gigabytes, so any modern external hard drive can do a 'system backup' of a modern operating system. It is the programs and documents that are on the system that take up the majority of space in an older computer.
An operating system that allows users to run interactive programs. Pretty much all operating systems that are on PCs are interactive OS's
enough to restquite ab-it to wonder and explore about and around
That depends on the cost of the new operating system and whether or not you will have to purchase new hardware to support it.
Your operating system can take up quite a bit of space, music and videos may also soak up quite a bit of memory. Consider investing in an external hard drive if you are having space issues on your computer.
Outer space is much bigger than the solar system.
There is no "the" operating system. There are LOTS of different ones available. Windows XP, Windows Vista Linux Mac OSX and much more... There is no "the" operating system. There are LOTS of different ones available. Windows XP, Windows Vista Linux Mac OSX and much more...
The Lynx Operating System can be downloaded for free.
Thrashing
The Windows operating system has been attacked the most by viruses. That is not so much because it is insecure as much as it is popular. If you were a malicious hacker and you only had time to target a single operating system, then you would likely choose the one with the most users.