RAM (Random Access Memory): RAM is a part of computer hardware which stores the operating system application programs and data or currently running processes kept so that they can quickly reach to the computer's process. The RAM is specially designed for the communication with processor as compared to the other storage devices like hard disk etc. because of its capability of fast data transfer. The data in the RAM stays there as long as your computer is on, and when the computer gets shutdown all the data from the RAM is wiped. The RAM can have different forms e.g. it can be in the form of a module which is to be plugged into the motherboard or it can also be in the form of a discrete microchips which are normally of 256 MB 512 MB.And most of the computers are designed which allows user to add these modules up to certain capacity.

ROM (Read Only Memory):-In addition to RAM there is another type of memory present in the computer which is called the ROM the other form of read only memory is CD-Rom storage, Floppy Disk every computer has a small capacity of ROM that holds enough programming which can load the operating system to the RAM.