Hardware and software are the two sides of a computer. If hardware is the heart, then software is the brain. A computer is of no use if there is no software on which different applications are totally dependant.
With the advent and growth of Internet, we have also seen an increase computer crimes and frauds. This has led to an increase computer security and reliability measures as these two pose a major threat in today's world.
A personal computer is made up of several hardware parts. Each hardware part comes with its own functionality which when put together forms the entire computer system.