What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Intellij Idea, Aptana, Netbeans and Eclipse

Computer is a invention which is making the ways to invent other things not just easier but also making the invention of the other things lightening fast. There is no field of life in which computer is not used. It is used in every field of life by installing programs for the concerned field and making the specific work easier and it is completed in a more efficient way and in less time.