Briefly explain the working of a control unit.

What is software?

Name the input or output device used to do the following:

(a) To output audio

(b) To enter textual data

(c) To make hard copy of a text file

(d) To display the data or information

(e) To enter audio-based command

(f) To build 3D models

(g) To assist a visually impaired individual in entering data

"Hardware is of no use without software and software cannot be used without hardware." Explain.