Not a real memory but it points to physical memory.
Put a code or security system on or a very secure password
Hope this helps...
The answers of the following are:
1. The answer is Linux. It is not an Operating System.
2. Windows XP 2000 and Windows XP Home Edition have the same interface design.
3. Linux is the operating systems which is considered to be open source.
4. Mac OS is an operating system which is considered to be the most popular with graphic and multimedia designers
5. The software programis the number and variety of programs available for a particular operating system.
If your powersupply has the standard 24 pin connector, you can make it switch on by connecting a green and a black (find a good picture to see the pin numbers). Google for the "paperclip test" for details.