[Abhishek000001]

Thank your for your response sir.

Okay I got it . But do we have any best possible classification system or map . That is most complete. A map which has tried to capture totality of all known knowledge without leaving anything significant. I want this so I am not unaware of any field of knowledge. Atleast any significant field of knowledge

Practically Best possible .

As you suggest I read about librarianship

And I got some maps

But a question comes in mind that which map should I trust For my needs . Which map has that quality.