Motherboard and Hard Disks

Motherboard:
I compare board like a plate where many foods are served to serve the consumer to eat. I mean to say that it  is device where many hardware and other essential things that is used to make a computers are kept.
It is a simple electric kit having many lines called BUS, which is connected with different parts like RAM slot, PCI slot, Power button slot, CPU slot and so on. The whole computer is controlled by motherboard.

RAM: Random access Memory is the full form of RAM. The main function of RAM is to save the instruction at a time when the users give some instruction unless he saves the file to the disk path. It is just a medium or path to save the file in the disk. It is not a permanent saving device.

HARD DISK: It is the storage device where huge number of data can be saved. So, it can be considered as a brain of the computer.Hard disk are of different size from mb (Megabyte) to TB (Terabyte).

A single hard disk usually consists of several platters. Each platter requires two reas/write heads, one for each side. All the read/write heads are attached to a single access arm so that they cannot move independently. Each platter has the same number of tracks, and a track location that cuts across all platters is called a cylinders. For example, a typical 84 megabyte hard disk for a PC might have two platters (four sides) and 1,053 cylinders.

In general, hard disks are less portable than floppies, although it is possible to buy Removable Hard Disks