Software can be thought of as the variable part of a computer and hardware the invariable part. Software is often divided into application software (programs that do work users are directly interested in) and system software (which includes operating systems and any program that supports application software). The term middleware is sometimes used to describe programming that mediates between application and system software or between two different kinds of application software.

Operating system is also a software through which we are execute or manipulate instructions and access data. For web development and software development also done on application softwares. Applet is a small application. java is a programming language..these are known as software that make software.

Antivirus; is the software that protect our computer from viruses, worms and threats.