What is system software ? What role does it play in the functioning of the computer ?

System software refers to the programs that control internal computer operations and make best use of the hardware. For example, operating system, language translators etc.

A system software is responsible for reading data from input devices, transmitting processed information to the output devices, checking system components, converting data/instructions to computer understandable form etc. Thus, it is responsible for the smooth functioning of the computer system and efficient utilisation of computer resources.