From time to time I get reservation of my tickets online through IRCTC.co.in website online. Generally I get coach number like A2, B2 etc.. but today,first time while booking my tickets i saw a new coach name which was beyond my knowledge and it was named "HAE" and coach number was the same as it was always for all of the coaches .

Though I am sure it is nothing to worry about, I just wanted to know to enhance my knowledge.

Nevermind, I found the answer myself, I hope it may help others in future..

Most of the people's while booking their ticket via IRCTC get coach numbers like HAE 4, here HA stands mainly for Half AC and the letter E is used to denote "EXTRA" which means an extra coach is attached .Therefore, in future will booking your tickets if anyone find such a type of reserved coach then don't panic it's mainly an extra coach .