Computer - Hardware
Hardware represents the physical and tangible components of a computer, i.e. the components that can be seen and touched.
Examples of Hardware are the following −
-  Input devices − keyboard, mouse, etc. 
-  Output devices − printer, monitor, etc. 
-  Secondary storage devices − Hard disk, CD, DVD, etc. 
-  Internal components − CPU, motherboard, RAM, etc. 
Relationship between Hardware and Software
-  Hardware and software are mutually dependent on each other. Both of them must work together to make a computer produce a useful output. 
-  Software cannot be utilized without supporting hardware. 
-  Hardware without a set of programs to operate upon cannot be utilized and is useless. 
-  To get a particular job done on the computer, relevant software should be loaded into the hardware. 
-  Hardware is a one-time expense. 
-  Software development is very expensive and is a continuing expense. 
-  Different software applications can be loaded on a hardware to run different jobs. 
-  A software acts as an interface between the user and the hardware. 
-  If the hardware is the 'heart' of a computer system, then the software is its 'soul'. Both are complementary to each other. 
